Chapter 313 - SPYING ON MOM

It was 11:00 on a Saturday in late July, and Marie was not surprised to find that neither of her kids was up. She'd just come home from 5 hours at her office and was heading to the kitchen to make some lunch. She was too starved to even think about changing.

As if on cue, the two 19 year olds (10 months apart) stumbled down the stairs one following the other a minute or two apart. John, the first to arrive, called out, "Hey, Mom, what's for breakfast?

"Eggs okay?"

"Sure thing - scrambled with cheese would be great.

John was tall, muscular, and handsome. Shy for some reason, he'd only had a few dates. He was dressed in shorts and an undershirt (and nothing else, though Marie did not guess this), unshaven and with tousled hair. He pulled out his phone and took a seat in the den, feet on the coffee table, facing the stairs.

Marie, always well dressed (at least outwardly!) and well kempt sighed - but it was Saturday, after all. Plus both kids were smart, kind, and generally well mannered. She'd done well.

Kelli, who followed John a minute later, reminded Marie of herself at 19 - long honey blonde hair (Kelli's, like John's, was tousled from the bed), and an amazing figure. Until recently, she'd been steadily dating a fellow. Marie was not sad to see that end.

But their greatest similarity was that both women had amazing boobs.

Marie had been a late bloomer, but then shot through a bra size every three months, settling out at a very full D, and Kelli had followed the same pattern. On their small frames, their boobs looked even larger. Neither had seen the other naked in a decade, but they also shared the same nipples - long (something like 3/8' when aroused - which was often!) - milk chocolate brown, and very erotically sensitive.

But whereas Marie had never been comfortable with her large tits, Kelli had been waiting impatiently for her breasts to fill in, and she had welcomed their arrival with open arms - and open hands and opposable thumbs. But more on that later. Kelli had also developed into what Marie considered a tease.

John's choice of where to sit was strategic. He'd taken rising a bit early on the weekends (relatively speaking), then listening for Kelli to hit the bathroom. That was his cue to amble downstairs and take up his "viewing spot."

John's shorts were actually tennis shorts. He liked them because they were kind of silky, plus they were, well short - at least shorter than is typical for regular shorts these days - plus the leg holes were wide. When he was inclined, he could easily reach up the leg to his dick. He was often inclined.

But not in the Den with Mom around the corner. Still, he DID pull the legs of the shorts up a bit, then he spread his own legs some. This allowed an irregular swirl of air from the ceiling fan to wash over his dick and balls. The former had started to swell minorly in anticipation of Kelli's arrival.

Fact is, Kelli, who'd been sleeping in the nude since she was 18, had been up even earlier to hear JOHN use the bathroom. She was on to his routine, and today, she was planning to take things a bit further, if she could summon the determination.

She threw back the covers and swiveled her head to take in her reflection in the mirror-covered closet doors. She loved swimming (her best style was the breasts stroke [she loved to add the extra "s" and the pause between words, at least to herself], and had an athletic body - really nice legs, a small but shapely butt, and a flat tummy. But there was one thing (well, two) keeping her from really being a competitive swimmer - her bountiful boobs.

They stood straight up on her chest, only conceding a few degrees of shift to gravity as she lay on her back. And all she had to do was THINK about touching her nipples and they sprouted, pushing up the better part of half an inch.

But then, she DID touch them, toying with both at once, then pausing to cup her more than a handful breasts. Alright, if we're going to do this plan, we need inspiration. With that, she grasped her nipples and pulled them straight up toward the ceiling time and again, whimpering softly each time they slipped from her grasp, reveling in the resulting contractions in her pussy as she felt the orgasm coming on.

Then it hit, and she allowed herself a long, low moan, her whole body going tense. It was nice being able to give in to those needs - to moan and writhe. She had learned to stifle all that in certain circumstances, as will be clear later.

Kelli clearly loved her nipple orgasms, but, since turning 18, she had also gotten used to screwing with her boyfriend. It had been three months since their breakup, and with college up north looming, she had taken herself off the dating circuit. No reason to get serious with anyone right now. But if she could summon the will power, she might have a plan to get some cock back in her life.

With the glow of the orgasm helping with her resolve, she laid out the clothes for the morning. It didn't take long. There was a new pair of frilly short shorts, which she slid up her legs, forgoing any underwear (she'd have to be careful about developing a damp spot, though!) and a new crop top, soft and bright yellow. As she pulled it down over her boobs, she looked in the mirror and saw a whole lot of abdomen below the end of the fabric.

More than that, while it hugged the outside half of each tit, it gave up contact once it got to her nipples. The fabric did not touch her skin from between her nipples running up until nearly to her collarbones. And the cherries on top, as it were, popped out obscenely, just begging for attention. The shadowy ghosts of her nipples and areolas took no effort at all to discern.

Ah - John just opened the bathroom door and went into his room. Once I hit the bathroom, he'll head downstairs.

Kelli did her business, washed up, and looked in the mirror. If she said so herself, she was hot. For luck and more resolve, she reached up under the top and twisted both of her nipples. Oh, my ... Yes, I'm ready.

And then, John heard her footsteps on the landing upstairs. While John held his breath and pretended to check his phone, he was actually intently watching his barefoot younger sister as she bounced down the stairs in a skipping kind of fashion, planting her right foot hard, pausing for a tenth of a second, then bouncing down two steps, barely touching the first with her left, then a full stop again on the right.

Given the fact that she was braless and was only wearing a flimsy cut off T shirt, her boobs were going through serious gyrations. And, of course, all that action had her nipples poking out like bullets by the time she hit the floor. That and the fact that she had primed her nips to hardness before even reaching the top of the stairs!

John let his breath out slowly as he tried to control the growth of his cock down his left shorts leg. What a freaking beauty he had for a sister!

Marie sighed again. Kelli had been going braless on weekends for three months now - ever since she broke up with Dick, now that she thought about it. But they had agreed, no oversight on clothes after high school. She'd soon be off to college and beyond reach anyway.

John took a moment to check out Kelli's legs, which were long and lithe and were only barely covered by some very short frilly shorts with wide leg holes. But first and foremost, he watched her tits bound and sway as she strode to the kitchen with exaggerated hip movements. "How was work, Momma - glad you could get home," she said.

"Thank you, dear. I hope we're ready for Monday, but the staff is still working. Hope I don't get a call to go back in. Scrambled eggs?"

"Sure. Let us know when they're up." With that, she plopped heavily into a seat opposite John. John almost convulsed watching her boobs ripple and sway before they settled; then Kelli slumped down and put her feet up on the coffee table as well. In this position, her torso was at more like a 45 degree angle. As a result, the lower edge of her crop top, instead of being suspended from her between nipples, now came to rest on the undersides of her boobs. Or at least, as much of the undersides as the length of the fabric allowed.

John looked up (yes, to her eyes!) gave her a nod, then pretended to work his phone for all of five seconds before once again staring at her nipples while making mock movements on the phone screen.

Wait - holey crap! It was only then that John discovered that he had a clear view of a couple of inches of the undersides of her amazing breasts, just resting on her rib cage!

Kelli spent 10 seconds working her own phone before glancing over the top of it to verify the focus of John's attention. She felt her nipples stiffen further.

Then began a series of texts between the two. Rather than make you try to read teenage text-speak, here's the (mostly) plain English version:

K: Turn off the sound on your phone

J: OK. I'm right here. Whaddup

K: Like what you see?

J: (After a pause) Huh?

K: My nipples. I know you've been staring

John shifted uneasily before replying.

J: Not me (smiley face)

K: It's OK - I kinda like it

K: In fact, I really like it.

J: Nice to know

John gave Kelli a broad grin and stared openly at her tits until the next text arrived.

K: You know I can see up the leg hole of your shorts

K: NO! Don't move! I've got a great view right now

J: How far up?

K: Far enough to know it's not a banana in your pocket

John's dick gave a spontaneous twitch.

K: Have you checked out MY shorts

John hadn't paid attention to anything more than her texts and her nipples, but Kelli had been slowly opening and closing her legs the whole time they were texting. It was actually a subtle and slow motion massage of her clit, and by now, there was a faint sucking noise whenever she spread her legs.

J: Holey ...

K: How far can YOU see?

J: Well, it's clear you're a natural blonde!

K: Like that's news.

J: Well, I'm sure believing what I'm seeing!

J: Do you know what you're doing to me?

J: With your nips AND your um your lips??

K: Uh, huh. And I believing I'm seeing that you like what you see!

J: You're amazing!

J: You know that I can see nips, right?

J: I mean I can see two darker bulls eye circles on your boobs, not just your points

K: Ayyyyuuup. They're called areolas

J: I knew that. You make it hard

J: To think! Hard to think! Dang.

J: You know I can see the underside of your boobs too, right?

K: Cool! Hadn't planned that. It's called underboob. You like?

J: You have no idea

K: Oh, I think it's clear your interest is rising

K: Nope - not a banana - they don't come that long or wide.

John hadn't been paying close attention, but his hardon was no long just down his leg; rather, it was going pretty much east-west, and had lifted the edge of his shorts over the middle of his thigh.

John flashed Kelli a smile, then glanced over his shoulder; Mom was now making toast and pouring juice. His "problem" was well out of her view.

K: Check this out

With that, Kelli feigned a yawn and a stretch, raising her hands high over her head and straightening her torso. She smiled and watched in fascination as John's dick twitched uncontrollably.

J: OMG! Half of you AREOLAS just slid into view!

J: You're a real PT - and I love you for it

K: Guess that makes you a CT, right?

K: Wanna swim later? I bot a new suit I think you'll really like!

J: You got it!

"Breakfast!" called Marie. "Would have been nice if you'd set the table," she muttered under her breath.

John chose his moment to get to the table, trying to hide his hardon with his phone as Marie moved the food from counter to table, but Kelli was positioned to see it head on, as it were, and gave him a sly smile and a wink.

Bringing the last of the food over, Marie chided "No phones at the table, John," just as he'd managed to take a seat without revealing his problem to his Mom.

"Sorry, guess I was distracted," he said with a quick glance at Kelli's nipples, then to her subtly smiling eyes. Much to his disappointment, she'd pulled the crop down to cover her areolas and underboob. Oh, well. But Mom was right there.

The three gathered around the table and made light conversation through half the meal, with John, of course, glancing at Kelli's still stiff nipples every chance he could. And the morning sunshine had the room toasty, so there was no chill involved to explain their hardness. Marie snuck in her own glances to determine where they were looking, but at 19, the die was cast. Plus, they were siblings - what's the harm in a little teasing? Today's semi-see through crop top was an escalation in the tease game, though. Marie sighed and thought, I wish someone had appreciated my boobs at that age. Or any age.

Marie had been in law school when Ken had met her and put her under his spell. He was handsome, funny, and at the top of the class. But when they screwed around (looking back, she couldn't call it making love - there was no increase in that commodity), he demanded that she keep her "udders" away from him, taking her from a spooning position.

Ten months later, they were married and John followed not long after, then Kelli 10 months after that.

They stayed together for the kids, but the sex, never great to begin with, petered out altogether a few years later. But Ken repressed any desire she had to show off her figure. Nearly any bra gave her cleavage, so all blouses needed to button pretty high. Marie was almost thankful when he died, even though she needed to step up her lawyering game to support the kids. The scars on her confidence as a woman, though, were slow to be overcome.

Just then, Marie's cell rang. It was the office - they needed her to see something.

"Be back soon, kids. Be good."

The two looked at other with libidinous thoughts in their heads, quickly finishing off the eggs and throwing the dishes in the sink.

"Time for that swim, John? I hope you like my suit - I kinda bought it with you in mind."

"Really?" Interesting and curious, he thought. "Well, sure, I'll be in the pool in a few minutes."

John arranged his timing so as to be following Kelli up the stairs. The frilly leg holes of Kelli's shorts flared out, and John got great views of her nicely rounded tush - but not of her lips, to his frustration.

Kelli, of course, knew EXACTLY what John was doing - or trying to do. At the last stair step, Kelli stopped short, and John almost face planted in that curvy tush.

"So, do you like the look of my ASSets more than my FRONTsets?"

"Um ... well, from what I can see, you have an A grade tush. But as you may have gathered, I'm partial to the forefront - the more fore the better."

"Prepare yourself for a treat, John - you ought to be able to make a clear choice soon enough."

"What has gotten INTO you recently, Sis?"

"Not enough, not enough. But I'm making up a plan as I go to fix that." With that mysterious comment and a coy smile, she just said, "See you in the pool," and ducked into her room.

"She had me in mind when she bought her suit. ... Man, I can't wait to see it." John gave his meat a few quick strokes in his own room, then donned his bathing trunks and was in the pool in short order. It was hot out, and the pool was maybe five degrees short of bathwater temperature. Not great for swimming laps, but fine for treading water and keeping an eye on the patio door. While he waited, not at all sure what Kelli might be planning, he pulled out his dick and relived the morning, stroking himself to a solid state.

Kelli, in her room was naked in a flash. Oh, I am so horny, she thought. Dick wasn't the nicest guy nor the best lover, but I do miss the sex we did have.

She pulled out the skimpy bikini that she'd bought with her Mom last week. The cups, such as they were, were only about three inches wide where they attached to the string that circled her torso. Then they slowly narrowed as they approached the band that went behind her neck. But what made it so sexy was that the material of the cups was only solid up to just barely over her areolas. From there on up, there was just a narrowing ladder of crocheted strings. Plus, it was unlined. If her nips stayed the way they were, John would definitely be staring!

The effect of the cup structure was that, from a distance, they sort of looked like solid cups running way up toward the neck. But just a little closer, and it was clear that the whole upper portion of her boobs was paying peek-a-boo through the wide holes of the mesh.

Plus, of course, with tits Kelli's size, that three inch wide cup base was going to leave a lot of breast flesh oozing out both the sides and into her cleavage area.

Kelli knew all that from trying it on in the fitting room. But now was the moment of truth. Would she wear it for John, and for how long?

"Well, nips, how horny are you?" Looking in the mirror, she lifted her heavy boobs - not that they sagged, but she enjoyed their heft. Then she let her tits fall through her hands, letting her nipples course through her fingers. She winced as she felt her pussy moisten instantly - well, further moisten - showing off to John downstairs had her perilously close to leaving a damp spot on her shorts.

Yep, I'm definitely wearing it. But for how long? With that she grabbed both nipples and pulled them straight out - hard. When they popped free, she felt her knees weaken. Right - I've been horny for too long. John is hot, and he's hot for me. Now is the time.

Kelli donned the suit, which did nothing to hide her stiff nipples. She slid the cup bases together a bit more, really magnifying both the sideboob view and the exposure between the cups. Lastly, she pulled up the thong bottom. She looked in the mirror, both front and back. Yep - if this doesn't get him hot for me, nothing will. She gave her nips another tug, then, before she lost her resolve, she bounded down the stairs.

As she closed the patio door behind her, giving John a great view of her naked rear, she heard John call out, "What took you so lo ... Oh, my goodness!"

Kelli sauntered over, rolling her shoulders to exaggerate the sway of her boobs. Although she hadn't intended it and didn't notice, this was just enough to expose a half inch of her right areola. John, on the other hand, DID notice. "You like?" she asked coyly, as she twirled and slowly entered the pool.

"Your boobs, not to mention your ass, could give a dead man a hardon!"

"Glad to hear it. Especially since you're NOT dead, and I've decided I need you to screw me." There, the words were out.

"What?" John said, sure that he had misheard.

With that, she splashed some water on her front, which instantly turned the bikini transparent. Kelli looked down, pleased with the clear view of her stiff nipples and surrounding areolas. Then, lifting her eyes to John while pulling one her nipples, she smiled seductively and repeated, "I said, I need you to screw me. You like even more?"

John's dick, which he had not touched, was twitching like crazy. "Oh, oh, oh ..." Then, somewhat regaining control, he managed, "Dang, Sis ... I'm more than hot for you, but your my sister!"

With a few swift strokes, Kelli was next to John, pressing her amazing tits into his chest. "Get over it. It's not like we're going to get married, but before I go to college, I've decided that I really need sex - sex with no strings. Who better to give it to me than you? We could be 'siblings with benefits,' right?"

"Um - impeccable logic, Kelli."With that, Kelli reached for John's trunks. "Wait - you mean right now?!"

"Ayyuup! I really want you, and really want you now!"

With that, Kelli attempted to pull down John's trunks, a task made somewhat difficult by his exceedingly long, hard boner. Then, she had her thong bottom off in a flash.

"But Mom could be home any second," John protested.

Kelli was pleased that the concept of the two of them screwing seemed no longer an issue - only logistics to work out. "She should be at least a half hour. Plus, that's a risk I'm willing to take," she said, as she guided her brother's stiff tool into her well lubricated pussy. "Oh, my - not only are you longer than Dick, you are SO thick! You really fill up my pussy. Why did I waste the last three years with him when YOU were right here? Dick - not such an apt nickname; now YOU'VE got a DICK!"

"Ohhhh... God you feel good!" was all John could manage. Keli began bouncing on him immediately.

"Kelli ... oh my ... Can we talk for a minute?" John reached out and held her hips against his own to stop the motion. "Whufff."

"John, you're not going to back out now, are you?"

"God no. You feel amazing. It's just that ... well, this is my first time and I ...."

"Say what? You're still a virgin??"

"Well, technically not anymore, but this IS my first time, and I'd like it last more than a few seconds. And you've got me VERY hot. But even though it's amazing - AMAZING - to be inside you ... well, I really want more of your boobs before I lose control. Yours are my first naked tits. In fact, when I saw your - your underboob and your areolas - in the den, that was the first time I'd seen any breast without anything between them and me. And, well ... I've wanted to touch your boobs since you turned 18. Could I do that?"

"You never got past first base on any of your dates?" John hung his head. "Sorry, John, I didn't know. But to state the obvious, your dick is in my cunt. I'd say pretty much anything you want you can have. Plus, I've been thinking of you holding my tits for probably two months now. Do you want to take my top off?"

"It would be awesome if you'd let me do it." With that, Kelli used her legs to hold John's cock deep insider her, but leaned forward to allow him to undo the tie at her neck. As he freed Kelli's tits from the confines of her bikini, he marveled at those amazing globes which, released from gravity by the buoyancy of the water, floated even higher on her chest. John was mesmerized.

"They are even more beautiful up close than I imagined. But I've never done this before - you'll tell me if I do something wrong?"

"Honey, it would be hard" a quick pussy clench emphasized her point "for you to do anything wrong at this point. Start gentle if you want, just don't get real rough."

He reached out to cup them, not feeling their weight because of the support provided by the water, but relishing in their firmness. Next he squeezed her boobs in his hands, marveling at how malleable they were - a squeeze here, a resulting bulge there, and a distortion of her areolas, which would go from circular to oval. Kelli, meanwhile, was starting to moan softly, and she had begun gently squeezing John's amazingly thick, hard, and deep cock. Gotta make this last, she thought, resisting the urge to come hard and fast.

"My god, your tits are more amazing than I ever imagined!" He next cupped her breasts from underneath, putting his thumbs in her cleavage, then squeezed inward with both sets of fingers. He was fascinated to watch his thumbs get swallowed by the mounds of tit flesh, totally disappearing between those incredibly sexy pillows. He felt himself convulse twice and had to close his eyes from the erotic display.

"The nipples, John. If you want to drive a girl crazy, boob caressing is awesome, but the nips are what really set girls off."

"I was saving the best for last," John cooed. "Man, if I had these puppies on my chest, I'd never leave them alone."

Some days are like that, Kelli thought. She wasn't yet willing to share all of her secrets out loud.

Finally, John did move his fingers to her nipples, giving them a gentle squeeze. This action produced an immediate and intense contraction around John's dick, and a guttural moan from Kelli. "You're doing fine," Kelli intoned, closing her eyes.

Kelli's nipples could, as the saying goes, cut glass they were so hard. John held his squeeze and gave both nipples a twist as well. "Ohhh, YES! You have amazing natural instincts! I really do love it when someone pinches my nipples," Kelli intoned, as she couldn't resist picking up the action down below. Ripples spread across the pool as they bounced on each other.

"Easy Kelli - easy. That's better, thanks. Um, even though you gave me permission, I kind of have to ask - could I kiss them?"

"Oh, John, that's been a fantasy of mine for a while."

"Oh, god - I am already so close - stop moving. Now I know Mom isn't likely to show, but let's put you between me and the patio door." The two rotated, then Kelli lay back a bit, allowing her amazingly buoyant boobs to break the surface, nipples first.

"Oh, they look SO delicious!" John leaned forward and gently kissed Kelli's left nipple. Immediately, her pussy muscles clamped hard around John's dick.

"Oh, god," they both grunted, trying to keep themselves on the upper side of the precipice. "Okay, John, that was nice. Now try biting down - very gently - then run your tongue over the end of my nipples. ... OH, my god! You'd better stop," was all Kelli could say. John just grunted and held his breath, trying to think of calculus - anything but this amazingly erotic scenario.

"Okay - for our first time, let's just ride each other for a while. No telling when Mom will be home," Kelli said, taking command.

Out of deference to the possible arrival of the mother figure, they now kept a foot of distance between their faces, secure in the knowledge that anything going on under the surface could not be seen from the patio doors. For as much as he wanted to keep kissing and nibbling Kelli's nipples, John contented himself with cupping Kelli's boobs and working her nipples with his fingers.

"This is so wrong, but it feels so amazing," John whispered. He was quite content to take in the sensation of Kelli's pulsating pussy around his cock and the sensuality he felt from pulling her rock hard nipples. Increasing the pressure on those precious nips, he pulled them harder and straight out.

"Ohhh, John ..." panted Kelli, her pussy muscles going into overdrive. Despite her hope to make this last longer, her need for release was becoming intense. John, for his part, was also fighting hard not to come. "Do that one more time, and I'm going to ..."

"Hi, John, hi, Kelli!" boomed their mother's cheerful voice as the patio door slid quietly open. "How's the water?"

"Oh, god," whispered John. He was so close. Even the friction of sliding out of his sister's slick canal could be too much. He braced himself for the inevitable disengagement, wondering what it would feel like to release his seed in the pool. His balls tensed.

But to his surprise, Kelli gripped his legs with her own, holding his rock hard tool deep within her pussy. Instead of pulling her whole body away, she merely straightened her arms to push John's shoulders another foot away from hers. She gave him a sly wink and a contraction around his cock that had him cringing - but still in control.

"Oh, hi, Mom! We didn't expect you back for a while." As she spoke, Kelli kept up a slow internal massage of John's dick, although she had stopped bouncing her hips on him. John couldn't believe that his super hard cock was still inside his sister and that she was quite casually talking to their Mom like nothing was happening. Unbelievable!

As the water calmed, John looked down to see her naked tits trying to float to the surface. They wobbled slowly left and right as the pair tread water. The lift from the water gave Kelli cleavage nearly to her chin. And those nipples were crinkled up like they'd been in the freezer, despite the warmth of the water.

"Would you believe they called just when I pulled into the parking lot? Seems they figured it out without me."

"Cool. Glad you're home. You deserve more of your weekends than you're taking. The pool feels great - want to join us?" John, still amazed at Kelli's control, couldn't resist; slowly he reached out to brush those inviting nips. Despite Kelli's arms on his shoulders, those delicious boobs poked out just far enough for him to reach. Oh, were her nipples ever hard! "Stop that," Kelli whispered, although there wasn't much conviction to the command; her pussy twitched a little harder around John's cock. And she didn't actually move his hands away from her nipples.

"Sure, that sounds great. Be right out." Another pussy clench and an answering three twitches from John. John gave Kelli's nips another tug

"How about wearing that new bikini?" Kelli called out just before the door closed. "It's too hot out today for your one piece suits." Kelli was once again starting a very slow bounce on John's dick.

"Well ... speaking of 'hot,' don't you think that suit might be too hot for me to wear in front of your brother? I bought it to wear, well, while no else is around."

"Oh, I'm sure he won't mind," Kelli called, giving John a hard pull insider her with her legs, "it's no skimpier than what I've got on right now." Another wink in John's direction, answered by an awesome (for both of them!) twist of her nipples.

"s-sure," John stuttered softly. Then, loud enough to be heard, "Sure, Mom, I won't mind - whatever," he managed.

"Ummm ... well ... okay. I'll be out in a few." The door slid closed.

"Oh, pinch my nipples, John, I really want to ... What are you doing??"

John had managed to extract his throbbing prick from Kelli's clenching pussy. As he grabbed their suits, he replied, "You'll find out, but we've got to move quickly. Here - bring these with you." With that he dragged Kelli out of the pool. With her fabulous boobs and his engorged dick flopping around, they headed to a shaded corner of the house.

"This better be good," Kelli whispered. "My nipples sure could have used another ... wait, isn't this Mom's bedroom?"

"Yep. Here, stand in the shade right here and I'll look over your shoulder."

"Mmmm, that's nice," Kelli whispered as John cupped both of her tits, immediately pinching her nipples while she felt the length of his upright dick against her right buttock.

"I can't believe how you casually talked to Mom while holding my dick in your tight, pulsating pussy the whole time! That was just so hot!"

[Author's note: I find that scenario - a couple engaged in sex but carrying on a conversation like nothing was happening incredibly hot. I've found only three stories that go in this direction: one by Samslam (My Virgin Sister, p5, the inspiration for this knock off) another by Tryanything (Service, p4), and variations of Sitting on My Son's Lap. Hints for how to search for this would be appreciated! Secret sex? Private orgasm?]

"Well, my old boyfriend was a dud, but he did teach me a few things. If you're good, I'll show you some more tricks I learned!"

"Oh, I'll be REAL good in that case."

Meanwhile, Marie was washing her hands in the bathroom and debating whether she could really wear that new suit. She was still dressed in her conservative (from outward appearances!) office clothes.

Marie, widowed three years ago, had thrown herself into her work after Ken died and was now full partner at her law firm, so appearances mattered - hence the prim skirt, white blouse, and dark jacket.. She was good at her work, and she'd been able to keep the kids in a private high school and now they were going to go to top flight - and expensive - colleges.

Marie was a real beauty for her age, with long straight hair, a trim waist, and full D tits. So far, she'd rebuffed the many advances that had come her way, telling herself that she did not have the time for a relationship; besides her first had been strained. The worst part was that Ken had not liked her large boobs and sensitive nipples.

But with Ken gone, she was starting to discover that she really did love sex, even if it had to be solo. About two years ago, she had found that her nipples were often all she needed to get herself off - in fact she loved knowing that some slightly rough nipple play could take her over the edge at any moment. After Ken had died, she had bought sexier bras, which she alternated depending on her outfit.

Today had been a shelf bra day, and while the friction of her opaque blouse on her nipples had kept them, and her, on edge all morning (for some reason, she had straightened her shoulders any number of times!), there had never been an opportunity to give those nips the attention they'd been calling for. Even in the ladies room, someone had always barged in at just the wrong moment.

As she looked in the mirror, she shed the jacket, pulled the blouse tight, and gave her tits a shake. The starched blouse largely hid the stiffness of her nipples, but nothing could cloak her clit from the electric shock that went its way from her nips!

Oh, you WANT to wear that bikini - but with John home, do you really dare? Still watching her reflection, she unbuttoned the blouse and gazed at her boobs.

Her breasts really did look okay, despite her age, she had to admit. [Ken had colored her view of her tits - in fact, they were awesome!] The shelf bra pushed them up and give her pretty good cleavage. But, God, did she love her nipples, which had been peeking over the top of the bra all day!! They were as stiff as they'd ever been, and she gave her nubbins a little tweak before gathering her clothes and moving to the bedroom.

John and Kelli simultaneously gasped when Marie entered the bedroom and turned on the lights.

"Oh, my, would you look at that bra? Has she had her nipples out all day?"

"Yes, she told me about buying that bra and how she loves the feel of her blouse rubbing her nipples. But I've never seen her nips before - they really are hot. By the way ... MY bedroom's at the other end of the house - have you been watching ME change for the pool, too?"

"Ummm ... welllll ... guilty as charged," John whispered, giving his sister's nipples a hard tweak. "Are you mad at me?"

"Oh ... that feels so good. I guess I'll forgive you, but only if you slide that hot, thick tool of yours back into me, and I mean right now!" With that, Kelli spread her legs and leaned forward, supporting herself with both hands on the window sill. She was very glad for virtual darkness that shade of the house and the shrubbery combined to provide, given how close she now was to the window. John lost his grip on Kelli's tits during this maneuver, so instead he put them on her shapely hips.

"You got it Sis!" John shifted his feet and repositioned his dick; Kelli reached down between her legs to guide him home. He easily plunged his entire length and breadth into her. "Oh, you are sooo wet! And I must admit, this is a grade A ass." he whispered. "Mmmmm," was all Kelli had to say. She gave her dangling boobs a shake, delighted at how they slapped together. If her nipples could get any more stiff, they did. "Hold my tits and twist my nipples again, John." When he complied, he felt her pussy contract hard around his dick. "Mmmmm," she repeated.

As they watched, Marie took off her prim skirt, under which she had worn a lacy pair of panties (a thong would not have worked with the needed panty-liner, although Marie had strongly considered it that morning). When the bra came off, both John and Kelli inhaled and tried to control their actions down below. Yes, Marie's boobs sagged, but only just a little - they looked awesome! And her nipples, maybe a bit shy of half an inch long, were tied up in such tight knots that her areolas were involved, too.

Marie opened a drawer and pulled out the new bikini - what there was of it. The bottom was little more than a thong, which was hot enough. But when John saw the top, he let go of Kelli's tits and grabbed her thighs again, whispering, "Stop moving, Sis - just - stop for a minute. Unggghh ... oh, that was close."

When Marie held the top up to her tits, all John could see was two florescent yellow triangles maybe three inches on each edge, plus various pieces of thick string that must somehow tie it all together. The two triangles, did, in fact, cover Marie's oversize areolas, but with not much to spare.

"Sis..."

"Yes? Can I move again?"

"I think so. Except ... Are you on the pill?"

"Heck of a time to ask, but yes, why?"

"Well, I just had two contractions, and it sure felt like thick fluid escaping my balls, going down my dick, and coming out deep inside you ..."

"You didn't COME, though, did you?"

"No, not really. I guess it was a miniorgasm? Glad your safe."

"Hm. Didn't know that could happen to guys. But I'm glad it wasn't the BIG O - I want to feel your hard meat inside me for as long as Mom's in her bedroom. And don't make me have to play with my own nipples - although I'd be more than happy to."

"You got it, Sis." With that, John's hands resumed cupping and hefting Kelli's hanging tits and brushing her very hard nipples. There was a decided schlrrrping noise from Kelli's pussy as they both restarted their slow motion fuck.

Kelli cooed, "You know, you've already lasted far longer - and deeper - than Dick ever did; why did I wait so long?"

Marie looked in the mirror and remembered how hot she'd felt trying the bikini on at the store. It had been her intent only to start wearing it when the kids had left for college. She now kind of regretted showing it to Kelli when they'd gone shopping last week. Now she felt a little trapped.

How could she wear this in front of John, she thought. Well, Ken never paid much attention to my tits, but John sure seems to be eyeing Kelli's boobs a lot - especially on what Marie was now calling "braless T shirt weekends." She wasn't quite sure why, but even Marie had found today's outfit kind of erotic - despite the warmth in the room, Kelli's nipples had never gone down. Plus being able to tell where breast flesh stopped and areolas began made her tingle. She envied Kelli's confidence in her body. And with the crop top, it would be so easy to reach underneath ...

Anyway - back to John - it might be nice having a man - he really is a man now - checking me out, even if he is my son.

Then her mind pivoted again. But this is too much. The old one piece isn't so bad.

"NO!" John and Kelli whispered simultaneously as they watched their Mom drop the bikini on the bed and reach back to the drawer. Still, they both loved watching the way Marie's boobs wobbled and bounced with the action. Plus her nipples were just as hard as before.

"John, I've got to check something out, but we've both got to calm down a bit - trust me. Hold still, and take your hands off my nipples for a bit."

"Um ... okay, I'm not on the edge anymore."

"Trust me, you soon will be. But I've GOT to feel you." With that, Kelli supported her weight with just one hand on the window sill; the other she brought down, elbowing a boob out of the way, until her hand touched her belly softy at the very top of her slit.

"You ready?"

"Yeah, I'm not sure for what but ..."

And then he felt Kelli's delicate fingers probing around her opening, attempting to circle his dick while feeling her own flesh right where his rod was entering his body.

"You are so, so thick, John, and I really love feeling you at the entrance to my body. It's just sooo hot!" Kelli's pussy was twitching up and down the full, full length of John's fat dick.

"Oh, god ... you'd better stop, you'd better ... oh, my god ..." With reluctance but with her sights set on feeling John's hard dick insider her for a lot longer, she removed her hand and regained her balance on the window sill.

"Definitely another mini for me," breathed John, "and pretty darn close to the big one."

"Just think about calculus for a minute. I sure don't want this to end quite yet."

Meanwhile, Marie had pulled up the one piece and settled her tits into the cups. Looking in the mirror, she saw lots of cleavage - but at the same time, she felt her nipples deflating. The suit was pretty, but not hot. And Marie had spent too much time on edge today to lose that special feeling.

Then, she had an inspiration - what if she cut the cup liners out? Then her nipples could, once again, rub against the fabric, and likely poke through as well. She reached into another drawer, took out some scissors, and lowered the straps, freeing her amazing tits. Her nipples re-puckered.

"What is she doing?" Kelli wondered aloud.

"I'm not sure, but I do love to watch her breasts bob around. And god, those nipples look SO hard!" An agreeing schlrrrp, schlrrrp came from Kelli's sopping cunt as the siblings kept rocking their hips. John tried to push deeper, but his dick could go no further.

"Speaking of bobbing breasts, John, ... do you know why men evolved opposable thumbs?"

"Say what? No. And what does that ..."

Kelli cut him off. "The reason you have opposable thumbs is so you can get a good grip on my hard nipples. Now, I want you to hold my nipples real tight ... that's good, no tighter ... now pull my nips out to each side until you lose your grip on them, preferably at the same time."

John pulled on her nipples until he could see Kelli's boobs on either side of her body, which he thought was really hot. When he could just see the edge of her areolas, he lost his grip on her nipples; then, her pendulous boobs swung back together with a resounding slapping noise when they met in the middle. A course of three or four pussy clenches rewarded Johns rigid tool, causing him to briefly convulse as well.

"Ohhhh, you could do that again ... and again ..."

"Umm, I will, but in a bit, in a bit."

When the siblings focused through the window again, they saw the cup liners fall in the trash can and finally understood. Marie pulled up the straps and settled her tits into the unlined suit, pulling it tight underneath her bust line.

She turned side to side, looking in the mirror, pleased with how prominent her nipples now were. She turned toward the door and flipped off the light.

"Well, that's our signal to ... wait, she's coming back in!"

Marie was definitely feeling the effects of her aching nipples, which were prodding her on to be more risqué. He's just my son - what harm could come from him seeing more of his old Mom than he bargained for? If he looks at my tits, great - it will feel nice to have a man look at me. And if he doesn't, well, I can make up my own fantasies later.

Marie shed the one piece and stood naked again, staring at the mirror. Her kids would have been fogging the window were it not so warm out. Well, nipples, what do you say, Marie thought. With that, she cupped her boobs, running her fingers up to her nipples, then simultaneously she grasped the nips with thumbs and forefingers and combined a twisting, pulling motion. When her nipples popped free, she felt a mini-orgasm course through her, and she visibly recoiled from the pleasure.

Marie took a seat on the bed, breathing heavily (which did wonders for her boobs, as John watched intently), and let the flush of the orgasm slowly fade.

"My god - did she just have an orgasm by tugging on her nipples?" Once again, John grasped Kelli's hips to stop the motion on his turgid, oozing dick.

"Sure looks like it. When I can't have a hard cock inside me as well, it's my favorite way to get off. Plus, unlike you poor guys, there's no limit to the number of times I can orgasm in a session." She paused, then pulled John's hands back up to her own aching tits and nipples. "You remember in high school when you commented that I always had good posture in English class?"

"Yeah, what of it," John whispered, eyes still looked on his Mom's nipples, his hands still caressing Kelli's nips, his dick once again making schlrrrping noises as he slowly pulled it out and then pushed it back into her love tunnel.

"Well, the thing is, I was the only one in that last row and my seat was against the right wall."

"So?" Schlrrrp, schlrrrp.

"Well, my good posture was just a ruse for allowing me to have nipple orgasms. See, with no one on my left, right or behind me and a thick book to block the view of anyone turning around - can you get any deeper? Oh, that's good. Now pinch my nips a little harder. Where was I?"

"Um," schlrrrrrrp, "no one on your right or left?"

"Yes. Oh, don't slow down. Umm. With no one to really see what I was doing, I could sit up straight and lean forward, with my left forearm on the desk. For one thing, I could lean my left boob onto my forearm and give it a subtle rubbing. But better - much better - was that once the class was taking notes, I'd ... whatever you're doing with my nipples, don't stop! When no one was paying attention, I'd undo a button or two in my blouse and sneak the fingers of my left hand inside. Works best on that side with women's clothes."

"Oh, that IS hot. Look, Mom's standing up again. God I love her nipples."

"Don't forget my own nipples, lover boy. How many things can you concentrate on at once?"

"Well, here's the big one," schlrrrp, "and here are two amazing boobs," he said, cupping them, "along with two very stiff nipples - so do two boobs and two nipples count as four or just two? Anyway, there's Mom in there touching her nipples again ... plus your story about sneaking your hand in your blouse."

"I wonder what's going on in her head. Yep, anyway, I decided early on that my bra was in the way of really stimulating my nipple. But no way would the school let me go braless!"

"Yes, they kept an eye on all of us."

"Sooo, I got out my scissors and a sewing kit and cut out a hole in my right bra cup for my nipple to pop through, then embroidered the hole so it wouldn't ravel."

"Sis, you amaze me more every minute. Wait - she's picking up the bikini again!"

"Oh, I really think you're going to love it. But anyway, I went through a ton of panty liners that year. I'd slide my fingers inside my blouse, then I'd start by touching myself on my bare rib cage. Then I'd find the underwire and slowly, slowly work my fingers up the silky underside of the bra cup, sort of pretending it was a guy trying to sneak up on my nipple."

"Yes, I can identify with that. Dang, she sat back down!" John interjected.

"Well, at least she hasn't picked up the one piece. Anyway, there were times that I'd take four, maybe five minutes just feeling the underside of my firm, plush boob in its silky container, stroking it back and forth, pushing in a little, weighing my heavy boob, just slowly working my way up and out ... out ... out to where my stiff nipple was waiting."

Kelli interrupted herself to ask, "You do know that I'm a D cup, right?"

"Ummm ..."

"Yeah, I thought so. Next time you want to snoop in someone's underwear drawer, make sure you put things back EXACTLY as you found them.

"Anyway, I really enjoyed building the tension as I worked my way up and out over my warm, firm boob. With a great cup size comes a great responsibility to go slow, to build the tension.

"Then, when I could feel the embroidered edge of the nipple hole, I had to hold back, just to let the tension build. God, I get hot just remembering! But once I got to my nipple, there was no fantasy about a boy - it was MY bare fingertip on my bare and very hard nipple, and it was like a jolt of electricity to my clit! It was the same every time - first contact, first orgasm! It was SO hot - just me and my nipple and the big O - right in the middle of class, no one else the wiser!"

Inside, Marie was once again debating with herself. That nipple mini- orgasm was beautiful, but that bikini is SO small. She looked down at her boobs. Screw you, Ken, I think they're very pretty. My nipples - oh, they are so hard! And I do so love to touch them. Maybe just a little more time playing with them. I'll tell the kids the office called back.

"Oh, there she goes playing with her nips again. I'm so glad you dragged me over here!" Kelli moved her hips a little more violently, forcing John's massive prick almost all the way out, then all the way in again.

"Man, is she hot. I just love the view from the side, where I can see both of her boobs in profile. Plus when she lets go of her nipples, they line up right at the end of her breasts, nothing behind them, just sticking straight out - amazing!"

"Anyway," Kelli continued, obviously the better multi-tasker and anxious to finish her high school nipple orgasm story, "after the first orgasm, I'd wait a bit, then, at first, I'd use just my index finger, riding up over my nipple, pushing it down, then letting it pop out below my finger, then back down. Sometimes I'd just brush the very tip of my nipple - that was really hot! Other times, I'd bend it round and round, trying to touch every side of that pillar.

"Then I'd get my middle finger going and pinch and pull my nip between the two fingers - sort of like you're going now! God, I loved getting myself off that way - fully dressed, bra included, in the middle of class, and no one knowing that I was playing with my bare naked nipple and having one private orgasm after another! When I was REALLY turned on and couldn't stop myself, I'd get my thumb inside too, so I could pinch my nipple harder. That was a little awkward, but so worth it!"

"Very ... very hot, Sis. Just slow down again... "

Inside, Marie watched the mirror intently as she tried straightening her arms, with her boobs caught in the middle. Wow! In an instant, she had a mile of cleavage, running right up to her collarbones. Her nipples and areolas stared back at her like two headlights. Why did I let Ken tear me down for so long, she thought.

Then, she decided to try something new, even if she wasn't sure it was feasible. She took both hands and lifted her left breast, then tilted her head down while torguing her boob inward from underneath. She reached out with her tongue, and just managed to lick the end of her nipple. Instantly, her knees buckled as a larger orgasm overtook her.

"Oh, my god, that looked amazing! I can't believe I never thought of that!"

"Hold .. on ... Sis" was all John could manage.

"I love the look on her face when she orgasms.

"Where was I? Oh, yeah. Anyway, I loved my nipple bra so much! I had to hand wash that bra a hundred times and throw clean regular ones in the wash so Mom wouldn't know - but god, did I love to give myself nipple orgasms in class! Private orgasms every day, with no one the wiser. I think my record was 10 in one period, but after three, it was hard to count. My panty liners just gave up!

"Most days, I'd come home, lock my door and take off everything but my special bra. Then I'd look in the mirror as I recreated my nipple orgasms from school, starting from below my bra just like in school, then working up and out till I hit my nipple. But instead of my nip being hidden, I could look straight at it or look in the mirror. Usually I'd come at least a couple more time.

"You know, I tried cutting the ends off both bra cups, but somehow it wasn't quite as erotic as looking down and seeing just the one hard nipple sticking out. A real specialty bra. I found it such a turn on to have it on that I wore it just about any time of day. In fact, I've still got that bra, if you'd ever like to see me wear it."

"Unnhh - that would be amazing Sis." Schlrrrrp, schlrrrrp. Then, suddenly inspired, he suggested, "Actually, I think I'd like to have you come into your bedroom dressed like you were for school, then strip down to just your nipple bra and then re-enact your afternoon routine of re-enacting your classroom nipple orgasms. And I'll watch through the window"

"Ohhh, don't slow down. Yeah, that would definitely be hot. You know, I was 18 that whole year - when I write this day up for Literotica I can include that story."

"Lit-a-what-ica?"

"It's a ... I'll show you later. How about pulling my nipples sideways again? That is SO good! What is she doing in there?

The two watched as Marie was once again pulling and twisting her nipples. Schlrrrp, schlrrrp.

"Did you know that there are 2500 nerve endings per square centimeter on your fingertips?"

"Um ... no ... how many on my..."

"I don't know the number, but I've got 10 times whatever that is in my vagina. A little harder please. Nice ... unhh ....

"Anyway, in class, when I'd try to let me mind focus solely on my fingertip rubbing my right nipple, it was like that sensation took over my entire brain - it was - still is, when I do it - awesome. Plus they've found that the nerves from the nipples, the clit, and the vagina all converge in your brain at just about the same point - the 'genital-sensing brain area.' Kind of explains why my clit lights up so fast when I play with nipples."

"Thanks for the biology lesson, Sis, but there's a whole lot of biology going on here that doesn't have to involve my head. I mean my brain, anyway. Looks like Mom is recovering."

"And what about you? My GSBA has registered a distinct drop in sensory input. Do you REALLY think with your tool? Can't process new facts while you keep up the motion? Can you show me you can walk and chew gum at the same time?"

"Anyone ever tell you you're a nerd? A sexy one - a very sexy one - but a nerd!"

"I don't mind what you call me so long as you keep moving. Mmmm. Much better."

Inside, Marie's resolve, along with her nipples, had further stiffened. The second nipple orgasm really did it. If her son liked what he saw, he was more than welcome to look. The erotic thrill of wearing the suit would have been enough with neither kid around, but the concept that John might find his old mother attractive would be a real bonus. She needed to be appreciated. Who knows, she might even try dating again.

Marie lay the bikini on the bed, arranging all of the strands so that she could make sense of it. John, of course, was panting as he watched his mother's boobs hanging down, wobbling with every movement. He knew they were a D cup (he'd checked her bra size the same day he'd checked on Kelli's), but knowing that and seeing them in the flesh was two different things.

John pulled Kelli's nipples out to the side a few more times, but it was .. um .. hard to know where to focus. Slap! Convulse, convulse, pause, repeat.

With her nipples throbbing (two orgasms is enough for now, my precious nips - the kids are certainly wondering what's taking so long, and I'll get back to you, I promise), Marie took the two ends meant to go around her rib cage. Putting the cups (or rather, the cloth triangles) behind her, she glanced down between her breasts to make the first tie. Swiveling the top around (again, John had to pause the hip action between him and his sister as he watched his mother's hands pushing her tits out of the way, the backs of her hands mounding the abundant flesh and "inadvertently" rubbing her nipples), she next found the neck halter pieces and brought them up, quickly tying them behind her neck.

"Holey crap - the whole underside of her boobs is open to the world!"

"Pipe down, brother, and get those hands back on my own boobs, and let's have some more hip action. God, my - our - juices have run down to my knees." Schlrrrp, schlrrrp.

With the halter tied, Marie looked in the mirror and adjusted the four strips of fabric connecting the base of the triangles with the band around her rib cage. While her areolas were fully covered, her nipples were poking through the thin fabric like tent poles. She couldn't resist giving them a quick tug.

"You know, Sis, when I spied on you getting into and out of your bikini, I thought that was the best. You should check out the loads of sperm I've left under your window! Then when we were in the pool, and you pulled me inside you and then Mom popped out and you held my dick in your pussy while you talked with her like nothing was going on - I could not imagine anything more erotic!

But now, here I am - my tool plunging the depths of your cunt, my hands holding your amazingly firm tits, my fingers tweaking your nipples - AND the two of us are watching Mom play with her own nipples - could it possibly get any better?"

"By the way - while I love being inside you, playing with your boobs, teasing your nipples, and watching Mom - what's in it for you?"

"Well, YOUR 'in it' for me, and I love what you do to my nipples. But as for Mom, we've started to get really close. Right, do that to my nipples again - mmm. She's lonely, and I'm hoping that wearing the suit will be a step toward getting her out of her shell."

"Plus, I have to admit, I kind of like watching her play with her body - I've been sort of pretending that I was doing what she was doing to myself. And I'm DEFINITELY going to try licking my own nipples!"

John had only minutes more to wait for an answer as to whether it could get better. Marie decided that, on closer inspection, the halter needed to be tied a little tighter - it would give more lift to her bountiful boobs. Plus it would show more underboob. When she finished retying the halter, she thought, now that's better - deeper cleavage above, more breast flesh below.

Then, just to see what might happen if she dove in the pool, she raised both arms straight over her head. The result took her breath away - not to mention that of her kids.

Oh, my! she thought. Looking in the mirror, she could see that the lower half of both areolas had slid from beneath the triangles - and lowering her arms had left them exposed. It seemed that her very, very stiff nipples, now just above the edge of the lower border of the patches, was all that had kept the fabric from slipping higher (or her boobs slipping lower, depending on your points of view). I'll have to be careful about that. Or, well, we'll see how the afternoon goes. Son, I'll be looking for a bulge in your swim shorts - love me, love my boobs, love my areolas, love my nipples.

"That is SOOOO sexy," both brother and sister whispered, both now just an extra plunge from release. Somehow, while naked was awesome, it was even more erotic to be WEARING something designed to cover the sensitive (oh, so sensitive!) parts and then find that they weren't really covered! "Mom, I've always loved you, but I really, really love your boobs, and your areolas and nipples are amazing," whispered John.

"So - do you love her boobs, areolas and nipples more than mine?" Kelli taunted, with an extra wiggle of her rear end.

"Oh ... hold on ... Whew! Another mini. Well, you are both pretty awesome, but what can I say? I'm deep in YOUR cunt, I'm holding YOUR boobs, and I'm twisting YOUR nipples - not much of a contest, right? Plus your areolas kind of mound up, which I find extra erotic."

"I guess I'll let you get away with that answer - for now. Now pull my nipples out wide one more time." Slap! Schlrrrp, schlrrrp.

Hmm, what if I were to bounce on the diving board, Marie thought. What might that do?

"You are awesome, John. But can you try one more thing? First, I want you to pull your tool NEARLY all the way out. ... Oh, yeah, your dick head feels so fat at my entrance. Did I say to push it back in? Okay. Now, I want you to pull my boobs out wide again, but hold on tight to those nips. Mmmm - nice. Now, when I count to three, pull hard so my nipples pop free, and at the same time, ram your dick home, then grab my nips again as quick as you can."

"That sounds real hot, Sis, but that might be too much."

"Again, a risk I'm ready to take right now. Ohhh, I do love when you twist my nips.

Inside, Marie lowered her arms and bent her legs to start her hop. What happened next was burnt into John's permanent long term memory.

"One."

To start her hop, Marie quickly straightened her legs. The inertia of her tits caused them to lag, creating an even bigger bulge of boob below the bikini. Still, her nipples clung to the seam at the bottom of the triangles. Her feet left the floor.

"Two."

As Marie passed the top of her hop and started to descend, the reverse happened. Her boobs lagged behind her torso on the way down, creating an unreal profile - much like the shape of Kelli's boobs when buoyed by water back in the pool.

Then, Marie touched down, but with more acceleration on her boobs than at the start of her jump. The breast flesh bulged further and further out below the overstressed nipple patches.

"Three!"

Finally, it all came together:

Kelli's nips slipped from John's fingers, shooting another signal to her pussy. Her boobs slapped together, harder than before.

John plunged his sopping, schlrrrping iron-hard dick into Kelli's pussy as hard and as deep as he could.

And as Marie watched her boobs in the mirror and the kids watched through the window, the tiny patches of cloth gave up their hold on her super hard nipples, though the edge of the fabric gave them an incredible caress as they popped free.

"Oh, god," said Marie, collapsing on the bed in full nipple orgasm. Nothing mini this time.

"Oh, god," said both John and Kelli, who had unwittingly timed their erotic experiment to coincide with Marie's nipple release and orgasm - the haystack that broke the camel's back, as it were, of their hope of holding off from coming.

Kelli clung to the window sill to keep from falling. But there was no controlling the muscles deep inside her, which milked and milked, and milked John's throbbing rod.

John flailed with his hands and managed to catch Kelli's rebounding boobs and then her nipples all the while erupting inside her. Hot jets of jism kept spurting and spurting and spurting into her pulsating love tunnel, bathing her cervix for what felt like two full minutes.

The rest of the world had disappeared, blotted out by the intensity of the feelings and hormones pounding through their bodies. The three were left panting, each reliving those final minutes, not even caring to think about what to do next."My nipples, John - you could start rubbing them again." These were the first words that Kelli was able to utter as her head began to clear from the fog of her mind blowing orgasm.

"Just be a little more gentle now. Right - nice and gentle - mmm." Then, recalling her climax, "That was so AMAZING!" Finally, as other senses and faculties started to register, "My god, you're still hard!" With that she began, once more, slowly rocking her hips.

"How could I not be," John whispered, although, in truth, even he was surprised. John's still muddled brain responded reflexively to the word "nipple," and he restarted his massage of those ever so stiff nubbins despite the fact that he could not have told you the time of day, the day of the week, or even in what city he lived.

Two minutes prior, despite all odds, neither John nor Kelli had lost their balance while simultaneously writhing through the most sensual, erotic, and explosive orgasms that either had ever experienced. Kelli, despite her extensive practice at maintaining perfect silence during her private, in-class, nipple orgasms, had not been able to hold back from emitting a long, low guttural moan. John, for his part, simply had held his breath until the urge to breathe became too great. He was still planting ever more of his seed in his sister even at that point.

All he knew was that he was DEFINITELY no longer a virgin, that he had just poured buckets of hot cum deep, deep inside his super-hot sister's sopping pussy, that he was still holding her sensuous, firm, D cup tits, that they were both naked, and that he had just watched his Mom, Marie, experience her own intense nipple orgasm by spying on her through her bedroom window. In fact, through it all (and even now), his eyes were focused firmly on Marie's throbbing nipples as they rocked back and forth on the tips of her upturned boobs as Marie's continued to pant, face up, on her bed. The way her turgid nipples both lined up in profile was a sight contributing to his rigidity - he loved that view!

Marie's intense nipple orgasm had been brought on by nipple play (lots of nipple play), the erotic display of her underboob in the mirror, including portions of her areolas, in the mirco-bikini, and the final tweak that her nipples had experienced when they popped free from the bikini top. That, along with the growing and exciting resolve to wear such a scanty bikini in front of her own son. Add to that the fact that her nipples, previously perched just over the edge of her half cup bra, had kept her sexually charged at work, and that final nipple pop pushed her over the edge - WAY over the edge!

For her part, Marie was also fighting through the fog of her own orgasm. As she did so, her hands rose to the exposed undersides of her breasts, which she gently caressed before her fingers drifted north to find her nipples, which she very gently pulled and twisted as she relived the intensity of her explosion.

Then, reality crept back in. "The kids - they're waiting for me at the pool!" she whispered. "I'm surprised they haven't come to check on me." But first, she realized, she'd need to clean up down below in the bathroom. She rose on unsteady legs, nipples still exposed under the tiny bikini top, and headed out of her bedroom door.

"Um ... Sis, I think we'd better find a way to clean up, don't you?" Nevertheless, he kept slowly pumping his dick into her and playing with her nipples.

"Don't panic - she doesn't have on the bikini bottom yet. Probably cleaning herself up. But you're right. Give one more big thrust and let's get to the pool. Oh, that feels good!"

"You want to just jump in the pool? But what about all of our - uh - fluids?"

"That's what we've got chlorine for, silly. Oops - she's coming back in for her bottom piece. Stay low, grab your suit and hurry!"

John took one more glance through his Mom's window. Amazing! Her nipples were still stiff and still poking out from under the bikini patches. But then he turned to follow Kelli's trim ass down the path, marveling at how her swaying boobs bobbed out left and right as she crouched out into the open.

Still naked, they walked into the pool and dunked down to shoulder depth while wiping away the residue of their encounter. "Jeez, John, how much spunk did you plant inside me? I don't think it's ever going to stop oozing out. Here - help me with my top."

John, who had swished his slowly shrinking dick around in the water and had pulled up his trunks, fumbled with the straps, standing behind Kelli. "This is another silly question, Sis, but ... this is our little secret, right?"

"Hey - incest may be legal here, so long as we don't marry, but remember, Mom's a lawyer AND my mother. No telling what she might do to you." With that, John's dick shriveled to the size of a gherkin just as he finished the last tie.

Sensing John's deflation, Kelli swung around, gave him a wink, and flashed him a dazzling smile. "I'm kidding, John! I'll only tell on you if we DON'T do this again. And again. And again! Come on, race you to the end of the pool!"

Poor John was left with an image of Kelli's buoyant boobs, hard nipples clear as day under the transparent bikini, and a head still spinning at Kelli's topsy turvy banter. But in a few quick free style stokes he had caught up with his breasts stroking sister.

Marie, meanwhile, had pulled up the thong bottom of her suit, then glanced in the mirror. "Oh, my, those are stiff nipples," she murmured, "but it's time to put you away, at least for now." Reluctantly, she adjusted the triangles of cloth to cover her nips and yes, even her areolas. But the strength of her orgasm had left her more, not less, determined to see whether she could wrest John's attention from his sexy sister. She wasn't sure where things were going, but she knew that she'd denied herself for far too long.

In fact, as she walked through the house, boobs wobbling softly, the powerful nipple orgasm took her back 24 years to her old lover Rod. She had soon learned he was a jerk, but he certainly did know how to work both her boobs AND her pussy. The more that memory played out, the more Marie realized that playing with her nipples was not enough - she needed a man to fill her up the way her fingers never could.

When Marie opened the patio door, her two children, now both breasts stroking at the near end of the pool, came to an immediate stop. Of course, they would need to at least feign surprise at her skimpy suit (which, in theory, they had never seen being worn before), but when Marie sauntered into the sunlight, they truly were awestruck.

Marie's nipples had never really gone down, and now, seeing that both children were checking her out, they turned to little pebbles. Well, medium sized pebbles, nubbins that the thin cloth could not hide, opaque though it was. Plus, although her areolas had been covered when she last checked the mirror, her wobbling bosoms had caused the suit to slip JUST enough for their darker colored skin to slip down into the daylight.

"Wow, Mom - you look awesome!" Kelli exclaimed as Marie daintily sat down at the edge of the pool, dangling her legs in the warm water. "That suit does more for you than I'd imagined!"

John, whose cock was definitely stirring back to life, felt an elbow to the ribs. "Yeah - I mean, yes, Mom, you look ... uh ... fantastic."

Despite herself, Marie felt her cheeks flush as she replied, "Well, thank you, children, it's been a long time since anyone has told me that. At least anyone who means anything to me," she amended, remembering some leering jerks at work.

She could feel John's eyes wandering all over her nearly naked body, but most of his attention was clearly on her breasts. A sly smile crept onto her face, and she clenched her thighs together as a warmth washed through her. She made no attempt to cover the obvious protrusions that her nipples made in her suit, only wishing, instead, that she could free them and twist them while watching John's expression. Her eyes glazed over at the images and sensations playing out in her mind.

"We've been doing laps for quite a while now," Kelli improvised, "did you get another phone call or something?"

In her sexual reverie, her long absence had slipped Marie's mind, so she was thankful for Kelli's prompt. "Um .. yes," she stammered, "but I was able to walk the staff through the forms over the phone, so I didn't have to go in again."

John, who had not stopped taking in his mother's underboob, stiff nipples, and partially exposed areolas, felt another jab to his ribs.

"Oh ... Glad to hear that, Mom. Want to join us?"

"Well ... maybe a lap or two would feel good."

Five minutes later, Marie confessed, "Wow, am I out of shape! I think those are the first laps I've swum all summer." With that, she pulled herself up onto the edge of the pool, unaware that the exercise had increased the amount of areola that she was now showing. Once again, only the stitching of the cups and the semi aroused state of her nipples was keeping her nips from sliding out from below the edge of the suit.

"Guess I've had enough, too," Kelli declared as she started to climb out. Then, thinking quickly, she looked down to "discover" how transparent her wet bikini was. Not only that, the flow of water over her tits had succeeded in pulling her cups down until not only the tops of her areolas were exposed through the upper mesh section, but both nipples were as well. "Oops - guess I should have checked before," she said, quickly covering her nips and sliding back into the pool. "Could you get me a towel, Mom?"

Marie followed Kelli's eyes, and found her own widening. "Wow - I mean, sure, Kelli, hold on." After the semi-transparent top Kelli had worn in the morning, Marie knew that Kelli was escalating her tease - but that bikini might as well not have been there! All it did was color her boobs a light shade of baby blue. And despite the workout, and the warm air, Kelli's nipples were, well, just as stiff as Marie's.

As she walked back to the house, John let out a low whistle as he got a good view of Marie's basically naked backside. "Whew! I guess there really is something to this genetics thing," John whispered.

"Dang, I hope I can look that good at 42," Kellie quietly agreed. Meanwhile, she reached over to take a swipe at John's trunks, confirming the suspected hardon.

"Quit it, Kelli - I don't know how I'm going to get out of the pool, and you're not helping!"

Marie continued to ruminate on Kelli's suit. She wondered if this 'I should have checked' story was a ruse, or, more likely, that Kelli had intended to drive her brother crazy. But to what end? Was she just a PT, or did she "want" him. Either way, if Marie was going to wrest John's attention away from Kelli, she might need to up her game. Damn, the girl's boobs were flawless, generous, and so sexy with those basically bare nipples poking through. Perhaps this towel thing could work to her advantage. She picked a large one from the bin and headed back.

As Marie sauntered back, she carefully held the towel to the side so as to show off her toned body and gently swaying boobs (and, though she did not know it, more and more of her areolas). Kelli climbed out of the pool and wrapped the proffered beach towel around her.

John, who was just treading water and gawking, couldn't keep his eyes off his mother's boobs. It was hard to believe that a nipple wasn't going to escape at any moment, and he didn't want to miss the event. But he surely couldn't come out of the pool, so he just continued to gawk.

"Whatcha doin', lov ... big brother?" Kelli felt her cheeks redden, realizing she'd almost let "lover boy" slip out. Only Marie's eyes betrayed that fact that she'd caught what Kelli might have started to say, but Kelli was looking at John and John only had eyes for Marie's nipples. Too bad about Kelli's nips being temporarily covered, but he wasn't complaining.

"Oh, um, I was trying to decide whether to get out or do a few more laps. I guess a little more swimming would be good - I don't get enough exercise at the club." Also, he reasoned, maybe he could relax a little if he swam hard. Okay, if he swam "with vigor;" the "hard" was what he hoped would subside.

"Suit yourself," Marie said, "I think I'm going to make myself a cocktail - I think I've earned it after this week. Well, this last six months. Would either of you like a cocktail?" "Cock" she thought to herself, knowing why she had repeated the word "cocktail." If only I could whip one up, as it were, in the kitchen, just for my own private use.

"Gin and tonic would be great," the siblings called out in unison.

As Marie walked back to the house, her mind was pulled in several directions. Perhaps foremost were the sensations from her boobs, which were only loosely constrained by the tiny patches of cloth that made up her bikini top. The way they wobbled was hard to ignore, and she found, even though no one could see, that she could not resist adding an extra bounce to her step. Damn it feels good to let my boobs bounce, she thought! In fact, she could not wait to get inside to give her nipples some attention.

Second, she found herself reliving the feeling of knowing that her son seemed to be captivated by the sight of her near naked tits. The way he had starred at her breasts made her pussy tingle, and she knew that the warmth she felt was leading to a flow of juices down below.

But speaking of juices, she felt her competitive juices rising when she thought of how John had been torn between looking at her underboob exposure vs his sister's basically naked tits! Marie had to admit that her daughter was quite a looker, but that didn't make her feel any better about her goal of having her own tits be the focus of John's attention.

Once she was inside, with the bright sunlight giving her protection from any prying eyes outside, she paused to look in the hallway mirror. Dang! Her areolas were both exposed from the underside of her bikini; had her bouncing approach to the house caused them to slip into view, or was that one reason that John seemed intent on staring at her breasts?

Well, no way to tell now. With a quick glance outside to confirm that her children were still at the pool, Marie quickly lifted the two bikini cups the last half inch to expose her very stiff nipples. This time, instead of pulling on her nipples until they slipped from her fingers, she gripped her nips tightly with thumb and index finger, then used her remaining fingers to bobble her ample breast flesh. Ohhhhh, that feels SO good, she thought. She loved feeling her boobs wobbling, plus the action really translated into amazing nipple stimulation. Almost immediately, a mini orgasm overtook her, and she fought for balance while maintaining the grip on her nipples.

As much as she wanted to keep playing with her nipples, she forced herself to stagger into the kitchen to make the drinks. But to keep her level of sexual excitement near its peak, she left her nipples exposed; she would cover them before she went back outside, she told herself. She looked down at her very stiff nips every few seconds and rubbed them frequently between the routine motions of mixing the drinks. God, was she hot - and wet.

Kelli, meanwhile, was also feeling the pressure to compete. Sure, with her suit fully wet, her boobs and her stiff nipples were as clear as day, but her Mom's suit was a challenge to controlling John's attention. Instinctively she knew that the accidental exposure of Marie's areolas was more erotic than her own more blatant nakedness.

As John touched the far wall, therefore, Kelli figured it was time to up the ante. With the towel still around her shoulders and her back to the house, Kelli pulled her bikini cups out to the sides, allowing her ample breasts to pop out fully free of the flimsy cloth. Flimsy though it was, however, it DID push in from the sides, giving Kelli a mile of cleavage between her very stiff nipples.

John, meanwhile, was still having a "hard" time. No matter how much energy he put into his swimming, he could not move his mind away from his mother's erotic display of underboob and his sister's more deliberately naked tits and stiff nipples. All his mind could see was the exposed breast flesh from both females, his mother's seemingly inadvertent display of her areolas, and his sister's very blatant display of her basically naked tits and nipples pointing out hard and proud despite the heat. Not to mention the memory of spewing gallons of his seed inside his sister's tight pussy not long ago.

As John approached Kelli's dangling legs, she reached up with both hands to cup her abundant boobs while twisting both of her nipples with her finger tips. As John surfaced and prepared to turn, she caught his eye and intoned, "Hot enough for you, John?"

Poor John, while trying to turn, was struck dumb by his sister's erotic actions - but yet the urge to breath caught up with him, and he found himself inhaling a mouthful of pool water.

Pausing to cough, he managed, "Jesus ... (cough, cough) ... Kelli! You're not making this any easier for me!"

"Very perceptive, lover boy. In fact, from now on, you can count on me being 'easy' and me keeping you hard. How's the swim working for you?" she asked, smiling impudently and continuing to pull and twist her crinkled nipples.

"You know that Mom could be back any second, right? Damn but your hot! I'd better try another lap."

"Oh, I can cover up in a second," purred Kelli as she pulled the now nearly (but only nearly) opaque cloth over her nipples. "But how are YOU going to get out of the pool?" she queried, with a lilt in her voice and a wink in her eye.

"Damn, you're a frigging siren," John called over his should as he started another lap.

As he pulled away, Kelli uncovered her boobs once more, found her stiff nipples, and began teasing those pulsating nubbins again. She had really been turned on having John just openly stare at her boobs all day, since sidelong glances were all he'd ever allowed himself before. And she just loved the way his eyes caressed the curves of her more than ample boobs and toyed back and forth with her nipples, one nip after the other nip, after the other nip. She'd never thought of exhibitionism, but his attention to her tits was certainly was amping up the sensitivity of her nipples today.

And having learned that he had been watching through her window (and cumming on her window sill!) was another turn on. What kind of shows must she have given him? Surely, he would have seen her at least casually playing with her nipples, since that was an almost constant preoccupation. Well, make that just "constant." But had he watched her have one of her frequent nipple orgasms? The thought intrigued and excited her.

In any event, he wasn't watching now, but her nipples were out, they were hard, and Mom was behind her and inside. That's all the excuse she needed to pick up the action on her nipples. Who knew how long Mom would be inside, and her nipples were begging for some rougher play! And she so loved toying with her nipples. In moments, she closed her eyes and thought back to how much she had enjoyed being filled with John's huge cock while he played with her nips and they both watched Mom and her own nipple play.

Pinching her nipples with more purpose, she squeezed her thighs together in response to the urgent signals from her clit. She felt a mini-orgasm building rapidly. Playing with her nipples out in the open like this, with real risk of discovery, added two new spices to the eroticism of playing with her nips, and they were hot spices indeed!