I never planned to fuck my sister. But the second she climbed into my bed that summer night, naked and already wet, all bets were off.
She was twenty-three, I was twenty-five, both of us home from college and bored out of our minds in the old house. Mom and Dad were asleep down the hall. The air was thick and hot. She didn’t say a word at first. She just slid under the sheet, grabbed my cock through my boxers, and squeezed.
“Been thinking about this all week,” she whispered, voice low and dirty. “Your dick. Wondering how it would feel inside me.”
I was hard in seconds. No hesitation, no guilt.
I yanked her on top of me, pulled her tits to my mouth, and sucked hard on her nipples while she ground her soaked pussy against my shaft. She was dripping. I could feel it soaking through the thin cotton.
“Take it out,” she ordered.
I shoved my boxers down. She wrapped her hand around me, stroked once, twice, then lined me up and sank down in one slow, greedy push. Her cunt was tight and burning hot. She moaned into my neck as she took every inch.
We didn’t make love. We fucked. Hard, quiet, filthy. She rode me like she’d been waiting years for it, hips rolling, ass slapping softly against my thighs. I grabbed her hips and thrust up to meet her, burying myself deep every time. The headboard tapped the wall once and we both froze, listening. Nothing. We kept going.
She leaned down, tits brushing my chest, and whispered right in my ear while she clenched around me.
“Tell me you’ve wanted to fuck your sister. Say it.”
“I’ve wanted to fuck you for years,” I growled back. “Wanted to bend you over and fill this tight cunt.”
That did it. She came hard, biting my shoulder to stay quiet, pussy pulsing and gushing around my cock. I flipped her onto her back, hooked her legs over my shoulders, and pounded her through it. The wet sound of my dick slamming into her was loud in the dark room. She reached down and rubbed her clit while I fucked her, eyes locked on mine.
“Cum inside me,” she begged. “Do it. Fill your sister up.”
I buried myself to the hilt and unloaded, pumping thick ropes deep into her. She kept twitching around me, milking every drop. We stayed locked together, breathing hard, sweat cooling on our skin.
After a minute she slid off, kissed the head of my cock clean, then crawled back up and pressed her body against mine.
“Tomorrow night,” she said, already half-asleep. “I want it in my ass.”
I was still inside her the next evening when the door clicked open again. This time it wasn’t an accident. It was planned. And it only got dirtier from there.
