(Simple fantasy story, doesn't bother with logistics or world-building. Set in a world where freeuse is universal, mutual, and consequence free. Fill in the blanks as you see fit.)
Bobby got up early to work on Saturday. He was trying to make a good impression at the new job, so volunteered to come in on the weekends when there was a chance. He was eating his eggs and toast in the family's small kitchen, thinking about whether he should get on the supplement.
Bobby had always been a fairly reserved guy. He wasn't socially awkward or anything. It wasn't like he struggled with eye contact or small talk or anything like that. And he was perfectly polite, he didn't turn down sex unless it was inconvenient or someone was being rude, same as any well adjusted person. Just last week he went to visit his mom at the diner and an old lady was practically gnawing on his cock under the bar, but he didn't complain. He didn't cum, because she wasn't good at what she was doing, but he didn't want to embarrass her, especially in a full restaurant in front of everyone.
But it was difficult not to imagine what his family would've done in that situation. His dad and his sister, of course. They were outgoing, they loved people's company.
His mom was more like him. Mostly, anyway. She liked to keep to herself, but she had a way about her: somehow the diner patrons that came over to her with their dicks out would still look satisfied after she had just gave them a good squeeze and blew them a kiss goodbye, and they just laughed and moved on. When women came over and touched on his mom, she'd put her hand down their pants and chew on their lip and they left just as satisfied.
Bobby knew his mom well enough that he understood it meant she just wasn't in the mood, and of course those customers respected that and were happy for what they got. What Bobby didn't understand was how gracefully his mom navigated interactions with strangers -- she had a bit of a brusque personality, but stuff like that was no issue. He was about to go to work, and he'd feel bad just because his new manager needed more cum than he could give her.
His rubbed his rye in the yolk and chewed and thought about it, turning his chair slightly away from the angle of the sun.
Rob came in the kitchen, red-faced and nude, his hair damp.
"Hey dad," Bobby said, after finishing the rest of his breakfast.
"Oh, hey bud," Rob said, pouring himself a glass of water: "You're up early."
"Working."
"Oh yeah? Don't work too hard. Proud of you, but keep your weekends open sometimes, enjoy yourself while you're young" Rob said. He took a sip from the glass and stretched.
Bobby said, "Just while I'm getting started. Making a good impression. But you're right. Thanks dad."
Rob patted him on the back and squeezed his shoulder as he went out to watch TV.
Bobby cleaned off his dishes and put them away and gathered up his clothes for the shower, clean shirt and underwear, but same pants as last time because he had forgot to do the wash early for a weekend shift.
He found his sister in the bathroom standing in front of the mirror, a robe pooled around her ankles and cum dripping out of her pussy and down her thighs.
Jordan took after both their parents, but you wouldn't be sure at first glance. She was the height of their mom, fairly short, but wide-set and with a natural muscularity that was clearly from their dad's side. Hair dark brown, almost black, like their mom, but wavy like Bobby and their dad. Her chubbiness wasn't from either side, though -- those were from another set of supplements she'd been taking, because the guys in the kitchen liked that.
Bobby liked it too. He sighed as he walked by her and got in the shower. The water came on cold at first, and he stepped out of the way, back against the cool tile of the shower, facing where his sister was looking him in the eyes smirking.
"And what are you sighing about?" Jordan said.
"Nothing, Jor," He said.
Jordan's tits were huge now, areolas stretched. As Bobby watched her she parted her legs and stretched. Her tits bounced while holding place, the creased mound between her thighs spread just enough to see the shadow of purple.
Bobby felt the water and it was warm now, so he stepped under and started washing himself.
