We were both adults when it happened, me twenty-four and my sister Leah twenty-two, but that didn't make the line any less forbidden. The family cabin was empty for the weekend, just the two of us after everyone else bailed on the trip. I figured we'd drink, watch movies, and call it a night. Instead, one bottle of whiskey later, Leah was straddling my lap on the old leather couch, grinding her soaked panties against my hard cock through my jeans.
"Fuck, this is wrong," she muttered, but she didn't stop. Her tits were pressed against my chest, nipples stiff under her thin tank top. I grabbed her ass with both hands and pulled her tighter, letting her feel every inch of me.
"Yeah it is," I said, voice low and rough. "You gonna stop?"
She answered by yanking her top off. Her tits spilled out, full and heavy, and I leaned in to suck one nipple into my mouth, biting just hard enough to make her gasp. Leah moaned and reached between us, fumbling my zipper down. My cock sprang out, thick and already leaking. She wrapped her hand around it and stroked once, twice, smearing the precum down the shaft.
"Goddamn, big brother," she breathed. "This thing's gonna split me open."
I didn't wait for more talk. I hooked my fingers in her panties and ripped them aside. She was dripping wet, shaved smooth, pussy lips swollen and slick. I lined up and thrust upward in one hard push. Leah cried out as I buried myself balls-deep in her tight cunt. She was hot and squeezing me like a fist.
We fucked like animals after that. No slow buildup, just raw, nasty pounding. Leah bounced on my cock, tits slapping against my face while I gripped her hips and drove up into her. The wet slap of skin filled the cabin. Every time she dropped down I felt her cervix kiss the head of my dick.
"Harder," she demanded. "Fuck your sister's pussy like you mean it."
I flipped her onto her back on the couch, shoved her knees to her chest, and hammered into her. Her juices coated my balls and ran down her ass crack. She clawed at my back, leaving red lines, and came hard, squirting around my cock, soaking the cushions. I didn't stop. I kept slamming into her spasming hole until my own orgasm hit. I pulled out at the last second and painted her stomach and tits with thick ropes of cum.
We didn't talk much after the first round. We just moved to the bedroom. Leah got on all fours, ass up, and I ate her pussy from behind, tongue fucking her hole and then licking up to her tight little asshole. She pushed back against my face, begging for more. When I slid two fingers into her cunt and one into her ass, she came again, face buried in the pillow.
Round two was slower but just as filthy. I fucked her doggy style, watching my cock disappear into her stretched pussy, then pulled out and pressed against her asshole. Leah reached back and spread her cheeks.
"Do it," she said. "Put it in my ass."
I worked my cock into her tight ring, inch by inch, until I was buried in her guts. She grunted and pushed back, taking it all. I fucked her ass steady and deep while she fingered her clit. When she came, her ass clamped down so hard I almost lost it. I pulled out and fed my cock back into her pussy, mixing her cream with the lube, then pulled out again and shot another load across her lower back.
We spent the whole weekend like that. Morning blowjobs with Leah on her knees in the kitchen, cum dripping down her chin onto her tits. Afternoon fucks in the shower, me pinning her against the wall and pounding her until the hot water ran out. Nighttime sessions where she rode me reverse cowgirl so I could watch her asshole wink while my cock stretched her cunt.
By Sunday we were sore, marked up with hickeys and bite marks, and completely addicted. We cleaned up the cabin, packed the car, and drove home like nothing had happened. But we both knew it would happen again. The real stories always do.
