I never planned on fucking my sister. It just happened one sticky summer night when our parents were out of town and the house felt too damn quiet. She was twenty-two, same as me, both of us home from college and bored out of our skulls. We started drinking in the living room, talking shit about old times, and before I knew it she was on my lap, grinding her ass against my cock through our shorts.
"Feel that?" she whispered, voice already thick. "You're hard for your own sister."
I didn't answer with words. I grabbed her hips and shoved up into her, letting her feel every inch. She moaned like a slut and yanked her tank top off. Her tits were perfect, nipples dark and tight. I sucked one into my mouth while she reached down and freed my cock, stroking it rough and fast.
We didn't make it to a bed. She stood up, peeled off her shorts and panties, and bent over the arm of the couch, ass up, pussy already glistening. "Put it in me," she said. "Right now. I want my brother’s dick in my cunt."
I slammed into her from behind. She was tight, hot, and soaking wet. Every thrust made wet slapping sounds that filled the room. She pushed back, taking me balls-deep, moaning "Fuck your sister, fuck your sister harder." I reached around and rubbed her clit while I pounded her, feeling her walls squeeze me.
We switched positions fast. She climbed on top, sank down on my cock, and rode me like she was starving for it. Her tits bounced in my face. I sucked them, bit them, while she ground her clit against me on every downstroke. "I'm gonna come on your cock," she panted. "Then I want you to fill me up. Cum in my vagina, brother. Cum deep inside your sister’s pussy."
She came first, shaking and cursing, pussy pulsing around me. I flipped her onto her back on the floor, hooked her legs over my shoulders, and drove in even deeper.
The angle let me hit her cervix with every thrust. She was loud, filthy, begging for my load.
"Give it to me," she kept saying. "Cum in sister’s vagina. Fill me up. I want to feel it leaking out of me all night."
I couldn't hold back. I buried myself to the hilt and exploded, pumping thick ropes of cum straight into her cunt. She clenched around me, milking every drop while she came again. We stayed locked together, panting, my cock still twitching inside her flooded pussy.
Later we moved to the shower, but I fucked her again against the tiles, adding another load to the mess already inside her. By morning her thighs were sticky with my cum and she kept reaching down to push it back in, whispering how much she loved having her brother’s seed in her vagina.
We didn't stop that weekend. Every time she bent over or spread her legs, I was inside her again, raw and dirty, filling her up exactly the way she asked. It was wrong, it was hot as hell, and neither of us wanted it to end.
