I slammed the door behind me after seeing the texts on her phone. My wife Lisa had been fucking her boss for months, sending him nudes and begging for his cock while I was at work. I was pissed, rock hard from the anger, and ready to burn it all down. Revenge hit me like a freight train when I remembered her younger sister, Megan, was staying with us for the week. Megan was 22, tight body, always flirting with me when Lisa wasn't looking. Time to turn the tables.
I found Megan in the guest room, scrolling on her phone in just a tank top and panties. "Your sister's a cheating slut," I told her straight. "Caught her sending videos of her sucking some guy's dick. You gonna help me get even?"
Megan looked up, eyes wide but a dirty smile creeping across her face. "Fuck, really? Lisa's always been the good girl. What do you want?"
I stepped closer, grabbing her by the hips and pulling her against me so she felt my hard cock through my jeans. "I want to fuck you raw. Right here. Make her hear it if she comes home early. Incest revenge, baby. Your sister's husband balls deep in her little sister."
She didn't hesitate. Megan dropped to her knees, yanking my zipper down and pulling my thick cock out. "God, it's bigger than I thought," she muttered before wrapping her lips around the head and sucking hard. Her tongue swirled while she bobbed, taking me deeper until I hit the back of her throat. I grabbed her hair and fucked her face, thrusting rough, spit dripping down her chin.
"Take it all, you dirty little slut," I growled. "Your sister's out there spreading her legs for her boss, so now I'm claiming this tight mouth." Megan moaned around my shaft, fingers sliding into her own panties to rub her wet pussy. I could smell her arousal already.
I pulled her up, spun her around, and bent her over the bed. Ripping her panties aside, I slammed into her from behind in one thrust. Her cunt was soaked, gripping me tight as I pounded her hard and fast. Skin slapped loud, her ass jiggling with every stroke. "Fuck yes, fuck me like you hate her," Megan gasped, pushing back to meet my thrusts. "Fill your wife's sister with cum."
I reached around and pinched her clit, rubbing circles while I drilled deeper. Her walls clenched, and she came screaming, juices running down my balls. I didn't stop, flipping her onto her back and hooking her legs over my shoulders. I drove in balls deep, watching her small tits bounce as I railed her. "Tell me how much better my cock feels than whatever losers you've had," I demanded.
"So much better," she moaned. "Thick and mean. Fuck, don't stop."
We switched positions again. I sat on the edge of the bed and had her ride me reverse, watching my cock disappear into her shaved pussy over and over. She ground down, swirling her hips, then bounced hard until I felt my balls tighten. "I'm gonna cum in you," I warned. "Breed this cheating-wife's sister's cunt."
"Do it," she begged, slamming down one last time. I exploded, pumping thick ropes of hot cum deep inside her, filling her until it leaked out around my shaft. She kept grinding, milking every drop while she came again, shaking on my lap.
We weren't done. I pulled out, pushed her to the floor, and had her clean my cock with her mouth, tasting our mixed juices. Then I bent her over again for round two, this time sliding a finger into her ass while I fucked her pussy. She begged for more, so I worked two fingers in, stretching her while I thrust.
By the time Lisa's car pulled into the driveway, Megan was on all fours on the living room floor, my cum dripping from her used holes, and I was behind her again, hard and ready for another round. Lisa walked in, froze, and stared.
I looked her dead in the eyes. "You fucked around. Now watch me fuck your sister. This is your revenge story, bitch."
Megan moaned louder on purpose, pushing back on my cock as I started thrusting again. Lisa stood there, face red, but her nipples hard under her shirt. She didn't leave. She watched while I railed Megan to another screaming orgasm, filling her again with a second load.
Afterward, Megan and I showered together, soaping each other up and fucking against the tiles one more time, slow and dirty, her legs wrapped around me. "This isn't over," I told her. "We're doing this every time your sister's out cheating. Incest sex revenge, full time."
Megan grinned, biting my lip. "Anytime, big brother-in-law. Make her regret it."
We made sure Lisa heard every moan that night. The marriage was done, but the revenge fuck sessions with her sister turned into a regular thing, raw and relentless.
Lisa could keep her boss. I had the better deal now.
