The day after the wedding, I moved into the new house with my stepdad and his son, Tyler. We were both 18, both stuck sharing the upstairs. Tyler was tall, lean, with short black hair and a smirk that said he knew exactly what he was doing. The first night, he walked out of the bathroom in nothing but a towel, water still dripping down his chest. My cock got hard so fast it hurt.
We didn't talk much at first. Just nods in the hallway. But the looks started quick. I'd catch him staring at my ass when I bent over to grab a beer from the fridge. He'd leave his door cracked when he jerked off, the wet sound of his fist on his dick loud enough to hear from my room. One Friday, our parents were out for the weekend. We ended up on the couch after dinner, some dumb action movie on, lights low.
Tyler shifted closer. "You ever fucked around with a guy?" he asked, voice low and direct.
"No," I said. My throat was tight. "You?"
"Yeah. A couple times. Want to try?"
He didn't wait for an answer. His hand landed on my thigh, then slid straight up to my crotch. He squeezed my dick through my shorts. I was already rock hard. "Fuck, you're thick," he muttered. He yanked my shorts down, freeing my cock. It slapped against my stomach. Tyler wrapped his fingers around it and started stroking, slow and firm, thumb rubbing over the head to spread the precum.
I grabbed his shirt and pulled it off. His chest was smooth, abs tight. I reached into his sweats and found his cock—long, veiny, hot in my hand. We stroked each other for a minute, breathing hard, then Tyler leaned in and kissed me rough. Tongues sliding, teeth nipping. He tasted like beer and salt.
"Get on your knees," he said.
I dropped down. His cock was right in front of my face, head shiny. I opened my mouth and took him in. The taste was strong, musky. I sucked the head, then pushed deeper, gagging a little when it hit the back of my throat. Tyler groaned and grabbed my hair, fucking my mouth in short thrusts. Spit ran down my chin onto his balls.
"Shit, that's good," he growled. He pulled out after a minute, hauled me up, and shoved me onto the couch on all fours. My ass was up. He spread my cheeks and spit on my hole. One finger pushed in, then two, stretching me open while he stroked my cock from underneath.
"Relax," he said. "Gonna fuck you now."
I heard him rip open a condom and slick lube on. The head of his cock pressed against my hole. He pushed slow at first, then harder. The burn hit, sharp and deep, but it turned hot fast. Inch by inch he sank in until his hips were flush against my ass. We both moaned.
He started thrusting. Hard, steady strokes that slapped skin on skin. Every time he bottomed out, his balls hit mine. I reached down and jerked my own cock in time with him. Tyler leaned over my back, biting my shoulder, one hand pinning my wrist to the couch.
"Fuck, your ass is tight," he grunted. "Taking it like you were made for this."
He pulled out, flipped me onto my back, and pushed my legs up. He slid back in deeper this way, hitting that spot inside that made my cock leak all over my stomach. We locked eyes while he pounded me. Sweat dripped from his chest onto mine. I wrapped my legs around his waist and pulled him harder.
"Don't stop," I said. "Fuck me harder."
Tyler slammed in faster, the couch creaking under us. His hand closed around my cock again, jerking me rough. The pressure built fast. My balls tightened. I came with a shout, ropes of cum shooting across my chest and his hand. My ass clenched around him. That pushed Tyler over. He buried himself deep, groaning loud as he filled the condom.
He stayed inside me for a minute, both of us panting. Then he pulled out slow, tied off the condom, and dropped it on the floor. We cleaned up with paper towels, but neither of us moved to put clothes back on.
Tyler grinned. "Round two in the shower?"
I nodded. My legs were still shaking, but my cock was already twitching again. We headed upstairs, and this time I pushed him against the tile wall first. His ass was firm under my hands. I dropped to my knees and spread him open, licking his hole until he was cursing and pushing back on my tongue. When I stood and pressed my cock against him, he reached back and guided me in.
We fucked standing up, water pounding over us. I reached around and stroked him while I thrust. He came first this time, shooting across the wall. I followed right after, buried to the hilt, filling him up.
Later, lying in his bed with the lights off, he said, "This stays between us.

But we're doing it again tomorrow."
I just smiled in the dark and reached for his cock. It was already half-hard again. The night wasn't over yet.