She was already on the couch when I walked in, skirt hiked up, panties pushed to the side, fingers working her slick pussy while some loud hentai played on the TV. The girl on screen had huge tits bouncing as her brother rammed her from behind, and my real sister looked exactly like she wanted the same thing.
"Fuck, don't just stand there," she said, voice low and dirty. "Get your cock out."
I didn't hesitate. My dick was already hard from the second I saw her spread legs and the wet shine on her fingers. I dropped my pants, stepped between her knees, and shoved two fingers straight into her tight hole. She was soaked, hot, and clenched down immediately.
"Been watching this shit all afternoon," she muttered, hips rolling against my hand. "Thinking about you pounding me just like that anime brother does."
I pulled my fingers out and slapped my cock against her clit a few times, smearing her juices around. Then I lined up and drove in balls-deep in one thrust. She gasped and grabbed my hips, pulling me harder.
"Harder," she ordered. "Fuck me like it's hentai. Make it nasty."
I grabbed her thighs, yanked her ass to the edge of the couch, and started pounding. Every stroke made wet slapping sounds. Her pussy gripped me tight, sucking me back in every time I pulled out. The hentai on the TV was loud, moans and wet squelches matching what we were doing. She reached down and rubbed her clit fast while I fucked her.
"Look at that," she panted. "My brother's cock stretching my cunt. You like that? You like fucking your sister while we watch this shit?"
"Yeah," I growled. "Your pussy feels better than any hentai slut."
I flipped her over onto her knees, face down on the cushions, and slammed back in from behind. Her ass bounced with every thrust. I reached around and pinched her nipples hard through her top, then yanked it down so her tits hung free. She pushed back against me, meeting every stroke.
"Spank me," she said. "Do it."
I slapped her ass hard, leaving red handprints, then did it again on the other cheek. She moaned louder. I leaned over her, grabbed a fistful of her hair, and pulled her head back while I kept driving my cock deep.
"Take it," I told her. "Take your brother's dick like the dirty incest slut you are."
She came first, pussy pulsing and flooding around my shaft. I didn't stop. I kept fucking her through it until her legs shook. Then I pulled out, spun her around, and shoved my cock into her mouth. She sucked greedily, tasting her own cum on me, taking me to the back of her throat.
When I was close I pulled out again, pushed her onto her back, and straddled her chest. I jerked off over her tits and face, shooting thick ropes across her skin. She licked what she could reach and rubbed the rest into her nipples.
We weren't done. She climbed on top, sank down on my cock again, and rode me slow at first, then fast and grinding. The hentai kept playing in the background, the animated siblings still going at it. My real sister leaned down, kissed me messy, and whispered against my mouth.
"Next time we do tentacles. But right now just keep fucking me."
I grabbed her hips and thrust up to meet her until we both came again, her clenching around me while I pumped another load deep inside her pussy.
We stayed like that, breathing hard, the hentai still running. She smiled, lazy and satisfied.
"Same time tomorrow?" she asked.
I nodded, already getting hard again inside her.
