Rita put her mouth on the cock-head and pushed down. She ran her lips down the length of the cock-shaft and waited with her nose against his balls, while Bill worked his tongue up her cunt-slit and probed, touching her clit, sending her ass heaving high.
Now she slipped her mouth up Tommy's cock-shaft and breathed while she worked her tongue in his piss-slit. He writhed under her mouth and then settled his hips while she went back down.
Bill continued running his tongue up just inside her cunt-lips to touch her clit lightly and withdraw. It was making the pulses of heat in her pussy turn to waves.
While Rita swelled toward orgasm, she glanced at Mitzi. The girl's back was arched and rigid while she still gave full lip-strokes on Bill's cock.
While Rita sucked on Tommy's cock his body stiffened under her. She picked up the pace, ramming her lips up and down faster and harder until his hot cum spurted deep in her throat.
Bill's tongue on Rita's clit was bringing her ass higher and higher off the bed as the huge wave of heat in her cunt built higher and higher and higher.
Then her back arched rigidly and her cunt-cum let go, flowing into Bill's waiting mouth.
Mitzi was still working her mouth up and down on Bill's prick, and his ass was bouncing on the bed. Soon he arched and quivered all over. His tongue in Rita's cunt became unsteady, jerking in spasms.
Rita slipped her lips up the cock-shaft and off the cock-head. She was breathing hard while she rested her face on his groin. After a moment, Bill drew his tongue out of her cunt.
"Well," Rita said, "do we know how to throw a party or what?"
"That was the greatest!" Mitzi said.
"Yeah!" Tommy agreed.
Bill said, "There should be a saying… the family that lays together, stays together."
"That's good, Bill," Rita said. "That reminds me, would you like to move in with us? I could use another son."
"Mom!" Tommy shouted. "Bill already has a family. Stop being such a mother hen."
"Oh, all right," she said. "But, Bill, I hope you'll come here for dinner often."
"You can depend on it, Rita," he said. "At least for dessert."