It started with a single text from my brother. "You and Lisa coming over tonight? Sarah's been talking about it all week. Time to stop teasing and do it." I read it twice, my cock already twitching in my jeans. Lisa and I had joked about swapping with Mike and Sarah for months, but now it was real. We were all adults, all married into the same family circle, and tonight we were going to fuck each other's spouses.
Lisa walked in from the shower, towel barely covering her tits. "Mike texted back?" she asked, eyes bright. "Yeah," I said. "They're ready. You still in?" She dropped the towel. "Fuck yes. I've wanted Mike's cock inside me since the last barbecue." I grabbed her, bent her over the bed, and slid two fingers into her wet pussy. "Save some for him," I growled, pumping her hard until she came on my hand. Then we got dressed and drove over.
Mike opened the door with a grin. Sarah stood behind him in a short robe, nipples poking through. "Drinks first or straight to it?" Mike asked. "Straight to it," Lisa said, already kicking off her shoes. Sarah pulled her into a kiss right there in the hallway, tongues sliding, hands grabbing asses. I watched Mike's eyes lock on Lisa's body as he stripped off his shirt. "Your wife has a great ass," he said to me. "Can't wait to bury my face in it."
We moved to the living room. Clothes hit the floor fast. Sarah dropped to her knees in front of me and took my cock in her mouth, sucking deep and sloppy. Lisa was already on the couch with Mike, legs spread, his tongue working her clit while she moaned and pulled his hair. "Fuck, your brother eats pussy better than you," she gasped, looking straight at me. That dirty talk lit me up. I thrust into Sarah's throat until she gagged, spit running down her chin.
Mike stood and lined up behind Lisa. "You want this cock?" he asked her. "Give it to me," she begged. He slammed in balls-deep. Lisa screamed and pushed back, taking every inch. I pulled Sarah up, bent her over the arm of the couch next to them, and drove into her tight pussy from behind. The wet sounds of two couples fucking filled the room. Lisa reached over and grabbed Sarah's hand. "Feels so fucking good, doesn't it?" she panted.
We switched after a while. I took Lisa on the floor while Mike fucked Sarah on the couch. Lisa's pussy was slick from watching, and she came hard around my cock, nails digging into my back. "Your turn to watch me take your brother," she whispered. Mike pulled out of Sarah and walked over. Lisa got on all fours and took him in her mouth, then turned and offered her ass.
He spit on her hole and pushed in slow, then hard. "Goddamn, she's tight," he grunted. Sarah straddled my face and I licked her while watching my wife get railed.
Later we moved to the bedroom. Lisa rode Mike reverse cowgirl while Sarah sat on his face. I stood at the edge and fucked Sarah's mouth again. Everyone was loud, filthy, no holding back. "Cum in my wife," I told Mike. He groaned and pumped her full, seed leaking out around his cock. Lisa came again, shaking. Then I flipped Sarah onto her back and pounded her until I filled her up too, watching Lisa lick my cum out of Sarah's pussy while Mike recovered for round two.
By the end of the night we were all sore, sticky, and grinning. Lisa curled against me in their guest bed, Mike and Sarah in the next room. "We doing this again next weekend?" she asked. "Fuck yes," I said. The family swapping was just getting started.
