I walked in on my wife getting railed by some random guy on our living room couch. Her legs were spread wide, his cock slamming into her wet pussy while she moaned like a slut. I froze for a second, then slammed the door. She scrambled up, cum dripping down her thigh, but I didn't stick around to hear excuses. "Fuck you both," I spat and left.
My sister Lisa lived two blocks away. At 28, she was always the one I could talk to when shit went wrong. I banged on her door, heart pounding with rage. She opened it in a tank top and shorts, her big tits barely contained, nipples poking through the fabric. "What's wrong, bro?" she asked.
I told her everything, raw and filthy. "Caught that cheating bitch with another man's cock buried in her cunt. She's been fucking around while I worked my ass off."
Lisa's eyes darkened. She pulled me inside and locked the door. "That fucking whore. You need to get even." Her hand brushed my arm, then lower, squeezing my thigh. "Let me help you forget her."
I grabbed her, pulling her close. Our mouths crashed together, tongues fighting dirty. I yanked her tank top down, sucking on her hard nipples while she moaned. "Fuck, yes, brother," she hissed. "Use me. Make her pay."
We didn't make it to the bedroom.
I shoved her against the wall, ripping her shorts off. Her pussy was shaved smooth and already soaked. I dropped to my knees and buried my face between her legs, licking her clit hard and fast. She tasted sweet and forbidden, her juices coating my tongue. Lisa grabbed my hair, grinding her cunt on my mouth. "Eat that pussy, you dirty fucker. Show me how mad you are."
I stood up, dropped my pants, and slammed my thick cock into her tight hole in one thrust. She screamed, "Goddamn, your dick feels huge!" I fucked her rough against the wall, her tits bouncing, her pussy gripping me like a vice. Every stroke was revenge, pounding out the image of my wife getting fucked by someone else. Lisa clawed my back. "Harder, brother! Fuck your sister like you hate me!"
We moved to the couch. I bent her over the armrest and drilled her from behind, slapping her ass red. Her cheeks jiggled with each brutal thrust. "Tell me how good my cock feels," I growled.
"Better than any other dick," she panted. "Fill me up. Cum in your sister's cunt."
I flipped her onto her back and drove in deep, watching my shaft disappear into her wet slit. She rubbed her clit while I fucked her, eyes locked on mine. It was raw and nasty, no romance, just pure filthy release. I felt her pussy spasm around me as she came, squirting a little on my balls. That pushed me over. I buried myself to the hilt and unloaded, pumping thick ropes of cum deep inside her. It leaked out around my cock as I kept thrusting through the orgasm.
We weren't done. Lisa pushed me down and straddled me, sliding my still-hard dick back into her cum-filled pussy. She rode me hard, tits swinging, dirty talk spilling out. "Imagine your wife's face if she knew you were balls-deep in me right now. Revenge fuck feels so good, doesn't it?"
I grabbed her hips and slammed up into her, making her scream. We switched positions again, me taking her on all fours on the floor, then missionary with her legs over my shoulders so I could pound even deeper. Sweat slicked our bodies. Her pussy milked me for another load, and I gave it to her, flooding her again while she begged for it.
After, we lay there breathing heavy, my cum dripping from her swollen cunt. Lisa smirked. "Send her a video next time. Let her see what real family loyalty looks like."
I went home later that night. My wife was waiting, crying apologies. I didn't say a word. I just pulled out my phone, showed her a short clip Lisa and I had recorded of me fucking her raw, and walked out for good. The revenge tasted sweet, dirty, and complete. Lisa and I kept meeting after that, turning the betrayal into our own filthy secret.
