Billy stopped talking and bent over Betty’s back. He pushed his butt up higher and started humping into her gut faster and harder. Joan watched his eyes close into narrow creases and sweat pop out on his forehead.
Joan’s hand went to her cunt and she slipped a finger up into the hole and put another finger on her clit. When she saw Billy put his hands on Betty’s shoulders and his toes dig into the bed she pulled her finger from her twat and moved around behind Billy. She lined up her finger with his asshole, eased it up against his little pucker and pushed.
Billy bounced up against Betty’s hips, driving his cock into her harder than he ever, had before. As his sister’s finger hit his prostate his cum spurted up his mother’s gut. Both Billy and Betty cried out as they came together. Billy fell off to the side and lay silent on the edge of the bed.
Betty inched forward, reluctant to let Jack’s cock slip from her pussy. When it did she rolled off and lay next to Billy, feeling his cock and balls with her fingers.
“Can you fuck me now?” asked Joan as she moved up to straddle Jack.
“God, yes.” He reached up and put his arms around her, letting his hands slide down to her hips.
“You’ll have to help me get your big cock in my little cunt,” she cooed as she lowered her titties to his chest.
Jack felt her hips and thighs, then caught her thighs and pulled her forward until he could reach around her and spread her pussy lips. He raised his hips and caught his cock just below the head and moved it around the dripping lips of her cunt to spread the lubrication around.
“Oh, that feels good,” whispered Joan. “You just rubbed it over my clit and I can feel all the squishy stuff running down through my cunt.”
“It’ll feel better than that once I get it in. Push your pussy back against it.”
Joan rocked back a little, letting her firm tits drag through the coarse hair on his chest. He lifted his hips at the same time and the bulging head of his cock popped through her juicy cunt lips.
“Oh, my God, it’s good. It doesn’t hurt like it did the first time.” She tried to spread her knees apart but she would have had to get up.
Jack moved his hands up on her hips and pressed down while he moved his hips up and down. Slowly his hard cock worked its way up into her warm, slick pussy. He let her lie there on top of him with half his cock up in her quivering belly before he started thrusting up into her. When he did start it was with short, slow strokes, moving his huge cock only enough, to slip the skin up and down on his shaft.
“What do you want me to do?” asked Joan. “Do I do the work when we’re like this?”
“No, darling. Just slip back a little to be sure it doesn’t slip out. All you have to do is hold your ass where I can get to it.”
She slipped down a little, lifting her ass a bit higher and he swung his hips up and his heavy veined cock slithered up into her burning cunt and slid back out. Both of them were thrilled by the tight fit of his big cock in her narrow pussy. With each stroke they were both aware of the slickness and heat and that special something else that they only felt when they were with each other.