The car smelled like sweat and cheap beer when we finally pulled over on that empty back road. My sister Emily had been teasing me all night at the family reunion, brushing her tits against my arm every chance she got, whispering how wet her pussy was under that short skirt. We were both adults, her twenty and me twenty-two, but that didn’t stop the filthy pull between us.
“Pull over,” she said, voice low and dirty. “I need your cock right now.”
I slammed the brakes and killed the engine. We climbed into the backseat like animals. Emily shoved me down and straddled my lap, grinding her soaked panties against my hard dick through my jeans.
“Fuck, you’re already throbbing,” she hissed, yanking my zipper down. Her hand wrapped around my thick shaft and she stroked it hard, thumb smearing the precum. “Big brother’s cock is so fucking ready for his little sister’s cunt.”
I ripped her panties aside and shoved two fingers straight into her dripping hole. She was tight, hot, and already clenching. “You’re such a slut for this,” I growled, pumping my fingers deep while my thumb rubbed her swollen clit. “Been wanting to fuck you since we were teens.”
Emily moaned and sank down onto my cock in one rough thrust. Her pussy stretched around me, gripping every inch as she bottomed out. “Yes, fill me up. Fuck your sister’s pussy in the backseat like the dirty incest whore I am.”
She rode me hard, hips slamming down, tits bouncing in my face. I yanked her top down and sucked on her nipples, biting them while my hands gripped her ass, spreading her cheeks so I could drive up deeper. The car rocked with every thrust. Skin slapped loud and wet.
“Harder,” she begged, nails digging into my shoulders. “Pound that incest cock into me. Make me cum all over my brother’s dick.”
I flipped her onto her back across the seat, legs over my shoulders, and slammed into her soaked cunt. The angle let me hit her g-spot with every brutal stroke. Her juices coated my balls and dripped down onto the upholstery. Emily’s moans turned into screams as she came, pussy pulsing and squirting around my cock.
I didn’t stop. I kept fucking her through it, pulling out only to flip her onto her stomach and shove back in from behind. Her ass cheeks spread wide as I drilled her, one hand fisting her hair, the other reaching around to rub her clit again.
“Tell me how much you love getting fucked by your brother,” I demanded.
“I love it,” she gasped. “Love your cock stretching my incest pussy. Cum in me. Fill your sister’s cunt with your load.”
I exploded deep inside her, pumping rope after rope of hot cum into her spasming hole. It overflowed, leaking out around my shaft as I kept thrusting through the orgasm. We stayed locked together, breathing hard, my cock still twitching in her cum-filled pussy.
Emily turned her head and kissed me messy and deep. “We’re doing this again before we get home,” she whispered. “Next time I want you to fuck my ass too.”
I was already getting hard again inside her. The backseat was ours for the rest of the night.
