brothers snuggling on the couch in the living room, their parents not minding because "they've always been that close, since they were toddlers." they've got a blanket over their lower halves, with older brother's hand right down the front of little brother's pajama pants. lil bro doesn't even bother with underwear anymore, he knows big bro doesn't like it when he wears them.
big bro hissing at lil bro to be still as he fingers him while their parents are just a few paces away on another sofa, pretending not to notice their sons getting all squirmy. lil bro who really sucks at being quiet but tries because big bro's fingers feel really good compared to his own, and he can't risk going back to just masturbating.
mom and dad, who can easily hear and see that lil bro is getting close. dad's dick is hard from the way lil bro sounds, his precious little angel. mom's more focused on big bro, her big, sweet boy, and how his fingers would feel.
the two boys are so caught up in their little world that they don't notice when dad starts palming himself, eventually taking his cock out to lazily stroke. it's easier for mom to be stealthy, all she has to to is just rub her clit under her dress.
lil bro cums hard on big bro's fingers, his cunt gushing around the invading digits as ecstasy courses through his body. he has to muffle himself in the couch cushions so he doesn't make too much noise and draw attention.
big brother freezes when dad tells him to keep going, just as he was about to pull his fingers out of lil bro's hole. lil bro is mortified as much as big bro is, especially when they look over and see their dad jerking himself off and their mom enjoying herself, too.
"aw, don't get shy now, boys," dad says, "it's just a little family fun, yeah?"
little brother looks back at big brother pleadingly. they were going to fuck regardless of getting caught, it was just a matter of time.
"now," mom chimes in, "get on the floor, boys. your father and i want to see it all."
big brother ends up mounting little brother on the plush carpet, fucking the younger boy within an inch of his life.
mom's the first to join, lying down in front of little brother and guiding his face to her pussy, which he shyly buries his face into.
dad on the other hand gets behind big bro, who he essentially engulfs in size, and holds him still. big bro isn't used to being fucked, especially not by his dad. it's painful at first, what with barely any prep and spit for lube, but he lets dad's thrusts control his own inside little bro's pussy.
idk how to end this... it just came to me and i had to write it.