The afternoon sun beat down on the backyard oasis, turning the massive infinity pool into a shimmering expanse of turquoise. The air was thick with summer heat—chlorine mixing with the faint floral scent of blooming jasmine from the hedges, cicadas buzzing lazily in the distance. After the shower, we'd migrated outside, drawn by the promise of cooling off... or heating things up further.
Sophia lounged on a wide chaise by the pool's edge, her body oiled and glistening under the sun. She wore a barely-there black bikini that strained against her full natural tits, the lace tops barely containing her hard nipples, and a thong bottom that disappeared between her thick ass cheeks. Her wavy brunette hair was tied up loosely, a few strands sticking to her sweat-damp neck. Blue eyes hidden behind sunglasses, she sipped a cocktail, legs spread just enough to tease the outline of her trimmed pussy through the fabric.
Ava sprawled nearby on a float in the shallow end, her pale skin already pinking slightly despite the sunscreen. Her plaid bikini was even skimpier—tiny triangles covering her small tits, the bottoms a thong that rode up her cute little ass as she shifted. Freckles danced across her shoulders and chest, wavy red hair wet and slicked back, water droplets tracing paths down her slim thighs.
I dove in to join Ava, the cool water shocking against my heated skin after the morning's marathon. My swim trunks did nothing to hide my perpetual hard-on these days—thick outline visible as I swam up behind her. "Enjoying the view, stepsis?" I growled low, hands gripping her waist under the water, pulling her ass back against my crotch.
She ground back teasingly, a soft moan escaping. "Always, stepbro. Especially when it's you." Her voice was breathy, slutty, as she reached back to palm me through the fabric.
Sophia watched from the chaise, a knowing smile on her full lips. She set her drink down, standing slowly—hips swaying as she sauntered to the pool's edge. "Don't start without me, you two." She untied her bikini top, letting it fall away. Her heavy tits bounced free, nipples pebbling in the breeze, water from a quick dip earlier still beading on them.
She slipped into the pool gracefully, pressing against me from the front while Ava stayed at my back. Sandwiched between them—Sophia's soft curves mashing into my chest, Ava's lithe body grinding from behind. Their hands roamed: Sophia stroking my cock through my trunks, Ava's fingers teasing my balls, then slipping under to fondle bare skin.
"Fuck... you two are insatiable," I groaned, head falling back as Sophia yanked my trunks down, freeing my throbbing shaft underwater. The cool water contrasted with their hot hands—Sophia pumping slow and firm, Ava's nails grazing lightly.
"We learned from the best," Ava purred, nipping my ear. She ducked under briefly, her mouth finding my cock—hot suction in the cool pool, tongue swirling as she deepthroated effortlessly. Bubbles rose as she bobbed, freckled face determined.
Sophia pulled me toward the pool steps, sitting me on the submerged ledge. Water lapped at our waists as she straddled me, thong pulled aside, sinking down on my length with a satisfied sigh. Her MILF pussy enveloped me—tight, wet heat despite the water, walls pulsing as she started riding slow. "Mmm, feel that, sweetie? Your stepmom's pussy milking you..."
Tits in my face, I sucked greedily—biting nipples, hands kneading her ass. Ava swam over, perching on the edge beside us, legs spread wide. Her fingers rubbed her clit furiously through her bikini bottom, eyes locked on where Sophia and I joined. "Fuck her harder, Ethan. Make Mom bounce on that big cock."
Jealousy flickered again—Ava's yandere edge sharpening as she leaned in, capturing Sophia's mouth in a fierce kiss while pinching her nipples hard. Sophia moaned into it, riding faster, water splashing with each grind.
I thrust up brutally, possessive now. "Both of you... mine." One hand tangled in Sophia's hair, yanking her head back; the other reached for Ava, fingering her soaked pussy—two fingers curling deep, thumb on her clit.
Ava came first, whimpering loudly—squirting into the pool, body shaking as overstimulation made her buck against my hand. "Yes... yours... breed me next!"
Sophia followed, pussy clenching hard as she ground down. "Fill me up again, Ethan... breed your stepmom deep!"
I did—pumping ropes inside her, overflowing as she kept riding through it. But Ava wasn't waiting. She pushed Sophia off gently, taking her place reverse cowgirl—slim ass facing me as she sank down, tight walls gripping fresh.
"Ride him, baby girl," Sophia encouraged, now kneeling in the shallow water, tongue lapping at Ava's clit while I thrust up. The dual sensation—Ava's pussy, Sophia's mouth—had Ava screaming, small tits heaving as she bounced wildly.
"Fuck... Mom's tongue... your cock... gonna cum!" Ava squirted again, harder this time, hot fluid mixing with pool water.
I spanked her ass red, hair-pulling as I railed her. "Take it, slutty stepsis. Cum all over your stepbrother's dick."
Overstimulation wrecked her—she begged incoherently, body trembling through multiple orgasms until I finally bred her too, flooding her depths with hot cum.
We floated lazily after, tangled in the water—kisses shared, hands teasing idly. But as the sun dipped lower, Sophia's phone buzzed again. Dad's text: "Flight landed early. Home in an hour."
Panic and thrill mixed in the air. Ava's hand stroked me under the water. "One more quick round? Risky... in the living room?"
Sophia's eyes darkened with forbidden excitement. "Why not? He won't suspect a thing... yet."
The danger only made my cock harden again.