Betty reached over and felt her way into Billy’s pajama bottoms. She wrapped her long fingers around his hard cock and held it as she looked at Joan.
“If you want to see what it’s like in the asshole I’ll help you. Is that okay with you, Billy?”
“Gosh, yes. I’ve got to do something to get rid of his boner. You want it in the asshole, Joan?”
“I think so. I think I do. Will you stop if I tell you to?”
“Don’t worry,” said Betty. “I’m here to help if things got out of hand. You’d better get it doggie style until you’re sure. Get over here in the middle of the bed.” She moved out of Joan’s way and watched as she got out of her gown and on her hands and knees.
Billy stripped and got behind his sister, putting his hands on her hips and pressing the mounds apart to expose her brown bun.
“No, Billy. I don’t want it in my asshole. Put it in my cunt.”
Billy let go of her hips and pulled the head of his upright cock down and aimed it at her cunt. He moved it around between her pussy lips to pick up juice and then pressed it in, sending two inches of his cock slithering into her twat from behind.
“Oh!” she shrieked as she moved forward. “Get it slick before you shove it in. I’m sore as hell.”
Betty moved down beside Billy. She wiped her fingers through her wet cunt and spread the slick fluid along the length of Billy’s cock. “Try it now,” she told him.
He pushed and his cock slid easily into Joan’s twat. This time she pressed back against him and he started fucking slowly, pushing his hard cock in until his hipbones met her hips and pulling back until only his cock head rammed between her warm, pink cunt lips.
“Oh, that’s so good,” cooed Joan. “Fuck me slow like that.”
Billy kept pushing his hard cock up into her steaming cunt slowly, pulling her back as he went forward and letting her go forward as he pulled back. It was a new position for both of them and they were enjoying the novelty of it.
Betty was on her hands and knees, watching Billy’s hard cock slipping through Joan’s tight pussy lips. She saw Billy’s shaft getting wetter and wetter as it moved into his sister’s dripping cunt. And her own hot cunt started producing juices again as she watched her children enjoying themselves. She put a finger on her throbbing clit and started working it around, rubbing it, moving it, pressing it. She got off the bed and squatted beside it, playing with her love bud and watching Billy’s cock slipping back and forth in Joan’s slick cunt.
Betty stepped back up on the bed, moved to the head, spread her thighs and slipped her butt down under Joan’s head. Joan still on her elbows, opened her eyes and looked at her mother’s steaming cunt. She moved her hands up and probed with her fingers all the secret softness of Betty’s cunt lips and clit.
Joan was fascinated by the nearness of Betty’s pussy. She had never seen another twat so close before. She pushed her finger up into the steaming wetness of the dark tunnel. Without thinking she started pumping her, finger in and out at the same speed Billy was pushing his cock into her. Knowing what she liked she pressed Betty’s clit and, moved her finger around in circles, stimulating the little nubbin while fucking the dripping cunt with her finger.