I caught my sister Lisa fucking some guy in the back of his truck last week. She was married to my best friend Dave, and there she was, bent over the tailgate with her skirt around her waist and some asshole pounding her from behind. I filmed the whole thing on my phone. When I showed her the video the next day, she turned white, then begged me not to tell Dave. I told her she had two choices: tell him herself or shut up and do exactly what I said. She picked the second option fast.
That night I made her come to my place. She walked in wearing a tight tank top and shorts, looking nervous but already flushed. I didn’t waste time with talk. I grabbed her by the hair and pushed her to her knees. “You like cheating on Dave? Then you’re gonna cheat with me too, and you’re gonna love it.” She looked up at me with those big eyes, lips parted, and nodded. I unzipped and fed her my cock. She sucked it like she’d been waiting for it, tongue swirling, taking it deep until she gagged. I fucked her face hard, spit running down her chin, and she moaned around my shaft like a filthy whore.
I dragged her to the bedroom and ripped her clothes off. Her tits were perfect, nipples hard, and her pussy was already soaked. I shoved two fingers inside her and felt how wet she was. “This is what you get for being a cheating slut,” I growled. I bent her over the bed and slammed into her from behind in one thrust. She cried out, but it turned into a moan quick. I pounded her hard, skin slapping, her ass jiggling with every stroke. I reached around and rubbed her clit until she came, shaking and cursing, pussy clamping down on my cock.
We didn’t stop there. I flipped her onto her back and fucked her missionary, legs spread wide, watching my dick disappear into her. She grabbed my ass and pulled me deeper, begging for more. “Harder, fuck me harder,” she gasped. I gave it to her, balls deep, sweat dripping. When I was close I pulled out and shot thick ropes across her tits and stomach. She rubbed it in like she loved being marked.
The next day she texted me that Dave was at work. I went over and fucked her in their marital bed. She rode me reverse cowgirl, ass bouncing, while I slapped it red. Then I flipped her and took her ass for the first time. She screamed at first but pushed back onto me, taking every inch. We came together, her pussy dripping onto the sheets that Dave slept on every night.
Every time she cheated with me it felt like revenge. She’d send me photos of her spreading her legs while Dave was in the next room. I’d show up, bend her over whatever was handy, and fuck her raw. Kitchen counter, bathroom sink, even once in their garage while Dave mowed the lawn. She’d bite her lip to stay quiet but always ended up begging louder.
One afternoon I made her call Dave on speaker while I was inside her. She tried to sound normal but her voice shook every time I thrust deep. “Yeah baby, just watching TV,” she lied, while my cock stretched her open. I came inside her right as she hung up. She licked me clean afterward, swallowing every drop.
Weeks passed like that. She stopped seeing the other guy and only wanted me. I kept the video as insurance, but she didn’t care anymore. She’d text me “need your cock” and I’d go wreck her.
Sometimes I tied her wrists with Dave’s ties and fucked her until she was a mess. Other times I made her crawl and suck me off before I bent her over and used every hole.
The best was the night she admitted she’d always wanted this. “I used to watch you when we were younger,” she confessed while I fucked her slow and deep on my couch. “Now I can’t stop.” I flipped her and took her ass again, holding her down while she came screaming. After that we didn’t pretend it was just revenge anymore. It was raw, dirty, and ours.
She still played the good wife for Dave, but every spare minute she spent on my dick. I’d cum in her, watch it leak out, then send her home with it still inside. She’d text me later how she fingered herself thinking about it. We kept going, hotter and filthier each time, until neither of us wanted it to end. She was my cheating sister, and I was the one who made sure she never forgot who owned that pussy now.
