Mark sat on the edge of the bed, cock already hard in his pants as he watched his wife Lisa strip for his brother. She was 28, thick ass and heavy tits bouncing free when she pulled her dress over her head. No bra, no panties, just smooth shaved pussy already glistening.
"Get on your knees, Lisa," Mike growled. He was bigger than Mark, always had been, and he knew it. Lisa dropped down without hesitation, unzipping Mike's jeans and pulling out his thick cock. She wrapped her lips around it and sucked loud and wet, spit dripping down her chin onto her tits.
Mark's hand went to his own dick but he didn't pull it out yet. He just watched. This was how it started months ago after too many drinks and Mike admitting he'd always wanted to fuck Lisa. Now it was regular. Lisa loved it. Mark loved watching her get used.
"Look at your husband while you suck me," Mike ordered. Lisa turned her eyes to Mark, mouth stretched around Mike's cock, cheeks hollowing as she bobbed faster. She moaned around it, the sound filthy in the quiet bedroom.
Mike grabbed her hair and fucked her face harder, balls slapping her chin.
"That's it, take it deep. Your husband's little dick can't do this." Lisa gagged but didn't pull back. Tears ran down her cheeks but she kept sucking like a whore.
When Mike pulled out, strings of spit connected her lips to his cock. He hauled her up and bent her over the bed right in front of Mark. "Spread your legs." Lisa did, arching her back so her pussy and ass were on full display. Mike slapped her ass hard, leaving red handprints, then lined up and shoved his cock balls-deep into her cunt in one thrust.
Lisa cried out, "Fuck yes, Mike, stretch me." Mark could see everything. Mike's thick shaft disappearing into his wife's wet hole, her lips gripping it on every stroke. Mike pounded her, the bed creaking, Lisa's tits swinging. She reached back and spread her ass cheeks wider so Mark could see her asshole too.
"Look at how she takes it," Mike said to Mark, not slowing down. "Your wife loves real cock." Lisa moaned louder, pushing back to meet every thrust. Her pussy made wet squelching sounds around Mike's dick. Mark finally pulled his own cock out and stroked it, but he didn't get to touch her. That was the rule.
Mike flipped her onto her back, lifted her legs over his shoulders, and drove back in. He fucked her harder, slapping her tits, calling her a slut while she begged for more. "Cum in me," Lisa panted. "Fill your brother's wife up."
Mike groaned and buried himself deep, unloading. Mark watched thick white cum leak out around Mike's cock as he kept pumping. When Mike pulled out, cum poured from Lisa's stretched pussy onto the sheets.
Lisa looked at Mark, eyes glassy with lust. "Clean me up, baby." Mark crawled between her legs and licked Mike's cum from her cunt, tasting the mix of both of them while Lisa ground against his tongue. Mike watched, already getting hard again.
They went another round, Mike fucking Lisa on all fours while Mark lay under her, licking her clit and tasting fresh cum as it leaked out. Lisa came screaming, her whole body shaking.
By the end of the night Lisa was a mess of sweat and cum, legs spread wide on the bed. Mark finally jerked off onto her stomach while Mike watched. No one said much after. They didn't need to. This was their family now.
