We were both drunk off cheap whiskey and the power had gone out in the old house we shared after Mom died. I was twenty-six, she was twenty-four, and we had been circling each other for months without saying shit about it. That night she tripped over my boots in the dark hallway and landed right on top of me on the couch. Her short skirt rode up, my sweatpants were loose, and my hard cock slipped straight into her wet pussy before either of us could stop it.
She gasped, “Fuck, Jake, what the hell?” but she didn’t pull off. Instead her hips rocked once, twice, like her body decided before her brain could. I felt every tight inch of her gripping me, hot and slick from nothing but accident and booze.
“Don’t move,” I growled, hands on her ass, but she was already grinding. The head of my dick dragged against her front wall and she moaned like she’d been waiting for this exact mistake.
I thrust up hard. She yelped and slammed down, taking me balls-deep. “This is so fucking wrong,” she panted, but her cunt clenched and dripped down my shaft. I flipped us so she was under me on the couch cushions, legs spread wide, and started pounding. The wet slap of skin filled the dark room. Every thrust made her tits bounce under her thin tank top. I yanked it down and sucked a nipple into my mouth while I fucked her harder.
She clawed my back. “Deeper, you bastard. If we’re doing this, wreck me.”
I gave her exactly that. Pulled out to the tip, slammed back in, again and again until her juices soaked the couch. She came first, shaking and cursing my name, pussy fluttering around my cock. I didn’t stop. I flipped her onto her stomach, yanked her hips up, and drove back inside from behind. Her ass cheeks spread around me and I watched my thick shaft disappear into her over and over.
“Tell me it’s an accident,” I demanded, voice rough.
“It’s an accident,” she whimpered. “Your cock just slipped in my cunt. Keep going.”
I reached under and rubbed her swollen clit in fast circles. She came again, screaming into the cushion, and I followed right after, pumping thick ropes of cum deep inside her.

We stayed locked together, breathing hard, my dick still twitching in her flooded pussy.
Neither of us moved for a long minute. Then she pushed back against me, and I felt myself getting hard again inside her. Round two started slower but dirtier. I pulled out, dragged my cum-slick cock up to her asshole, and pushed in just enough to make her gasp before sliding back into her cunt. We fucked like that for hours, switching holes, switching positions, both of us pretending every time it was still an accident.
By morning light we were sticky, sore, and already planning the next “mistake.”