Warning: Explicit sexual content, male/male relationship, public sex, extreme size difference, rough sex, semi-public setting. 18+ only.
Mark turned with shaking legs, pressing his palms against the wet tile wall. Behind him, he heard Derek moving, then felt large hands on his hips, positioning him.
"Spread your legs wider."
Mark did, feeling completely exposed, vulnerable in a way that was both terrifying and exhilarating.
"Have you bottomed before?" Derek asked.
"Yes. A few times."
"How big were they?"
"Six inches. Maybe seven."
Derek laughed darkly. "Baby, you're about to experience something completely different."
Mark felt something cold and slick...lube, where had Derek gotten lube?—being applied to his hole. Then a finger pushed inside, thick and insistent.
"Relax," Derek commanded. "This is going to be intense, but I'm going to make sure you can take it."
He worked Mark open patiently....one finger, then two, then three—stretching him, preparing him, making sure he was as ready as possible for what was coming.
But nothing could have prepared Mark for the feeling of that massive cock pressing against his entrance.
"Breathe," Derek instructed. "Deep breath in. And when you exhale, I'm going to push inside. Okay?"
Mark nodded, not trusting his voice.
He took a deep breath, and as he exhaled, Derek pushed forward.
The pain was immediate and overwhelming. Mark cried out, his hands scrabbling against the tile wall as his body stretched impossibly wide to accommodate that thick shaft.
"Easy," Derek murmured, holding still. "Just breathe. Let your body adjust."
"It's too big," Mark sobbed. "I can't..."
"Yes, you can. You're doing so well. Look how much you've already taken."
Mark looked down and saw maybe four inches had disappeared inside him. Eleven more to go. The realization made him whimper.
"Don't think about all of it," Derek advised, his large hands rubbing soothing circles on Mark's hips. "Just focus on breathing. On relaxing. Let me in."
He pushed deeper....slowly, carefully, giving Mark time to adjust to each new inch. The stretch was beyond anything Mark had experienced. He felt split open, impaled, claimed in the most primal way.
When Derek finally bottomed out....all fifteen inches buried inside Mark's ass....Mark was shaking, tears streaming down his face, completely overwhelmed.
"There we go," Derek said, his voice strained. "All of it. Every fucking inch. You did it, baby. You took all of me."
"Oh God," Mark gasped. "I'm so full. I've never....it's so much...."
"I know. But you're going to love it. Trust me."
Derek pulled back slightly and thrust forward, and Mark's vision whited out at the sensation. That massive cock dragged against every nerve ending, hit places inside him he didn't know existed, created pleasure so intense it bordered on pain.
"Fuck!" Mark screamed, not caring if anyone heard. "Oh fuck, Derek!"
"That's it," Derek growled, establishing a rhythm now....deep, controlled thrusts that had Mark's entire body jolting forward with each impact. "Take it. Take this cock. Let me hear you."
Mark couldn't have been quiet if he tried. He was screaming, sobbing, making sounds he'd never made before as Derek pounded into him with increasing intensity. The shower water mixed with his tears, his hands kept slipping on the wet tiles, and he'd never felt anything so intense in his life.
"Your ass is heaven," Derek groaned, his pace increasing. "So fucking tight. Squeezing my cock like you were made for it."
"More," Mark heard himself beg. "Please, Derek, harder..."
"You want it harder?" Derek's laugh was dark. "Careful what you wish for."
He adjusted his angle and then truly let loose....brutal, punishing thrusts that had the sound of flesh slapping against flesh echoing through the shower room. Mark's cock was rock hard, bouncing with each thrust, leaking steadily without any stimulation.
"You're going to come just from my cock," Derek said, reaching around to grip Mark's shaft. "No one's ever made you come from just fucking, have they?"
"No," Mark gasped.
"I will. I'm going to make you come so hard you see stars."
Derek increased his pace even more...faster, harder, deeper...his hand working Mark's cock in time with his thrusts, and Mark felt his orgasm building impossibly fast.
"I'm going to—Derek, I'm—"
"Do it. Come on my cock. Show me how much you love being stretched by this monster dick."
Mark came with a scream that echoed off the tile walls, his cock pulsing in Derek's hand, cum shooting against the shower wall, his ass clenching tight around that massive shaft buried inside him.
"Fuck yes," Derek groaned. "Just like that. Milk my cock with that tight ass."
He pounded through Mark's orgasm, never stopping, never slowing, and Mark was so oversensitive that it was almost painful—but he didn't want Derek to stop.
"I'm close," Derek warned. "Where do you want it?"
"Inside," Mark begged. "Fill me. Please."
Derek thrust deep one final time and came.....Mark felt it, hot spurts filling him, so much that it started leaking out around Derek's cock still buried inside him.
When Derek finally pulled out, Mark's legs gave out. Only Derek's strong arms kept him from collapsing on the wet floor
.
*******
Derek held Mark steady under the spray, both of them catching their breath.
"You okay?" Derek asked, his voice gentler now.
"That was..." Mark couldn't find words. "I've never..."
"I know. You did so well. Took all of me like a champ." Derek pressed a surprisingly tender kiss to Mark's shoulder. "Think you can stand on your own?"
"Maybe. Eventually."
Derek chuckled and helped Mark clean up properly, washing away the evidence of what they'd done. His touch was careful now, almost reverent, a stark contrast to the brutal fucking minutes earlier.
"This can't be a one-time thing," Derek said as they dried off. "Not after that. I need to fuck you again."
Mark's used hole clenched at the words, already anticipating more despite the ache.
"What about the risk?" Mark asked. "Getting caught?"
"We'll be more careful next time. My place, maybe. Or yours." Derek pulled out his phone from his locker. "Give me your number."
Mark did, still slightly dazed from what had just happened.
"I'll text you," Derek promised. "Tomorrow. We'll set something up."
As Mark finished dressing on shaky legs, Derek approached him one more time.
"Hey," he said softly, tilting Mark's chin up. "You were fucking perfect. Don't ever think otherwise."
He kissed Mark again....slower this time, deeper, a promise of things to come.
When Mark finally left the gym, walking carefully, cum still leaking from his well-used hole, his phone buzzed.
Derek: Same time next week? My place. I'll pick you up.
Mark smiled, his fingers moving over the screen.
Mark: Can't wait.
He'd come to the gym tonight for a late workout.
He'd left with so much more.