She flung her head front side to side, spraying water out of her hair.

"I bet that was something Bob didn't mention," she laughed.

"How could I, Mom?" he said. "You only sucked me off this morning. Billy was still in school."

"Gosh!" Billy grunted, his eyes huge as he looked at his mother. "You suck cock, Mother?"

"Not only do I suck cock, darling," Susan said in a throaty voice, "but I'll let you come in my mouth, too."

"Gosh!" Billy said again, his eyes enormous. "Pamie won't even let us come in her…" He stopped, his face turning pink.

"She won't let you come in her cunt," Susan finished for him. "It's time to stop acting so embarrassed, Billy."

"Do it again, Mom," Bob said.

"Of course," Susan giggled, and dipped under the water again.

She went straight to Billy's cock this time. When she sucked his prick into her mouth, he didn't try to pull away. Instead he arched his cock into her mouth, placing a band on the back of her head. Susan, holding her breath, was delighted as her youngest son began to fuck her mouth, plunging his prick deep into her throat. But, as much as she wanted to suck him off, to taste the sweetness of his young balls, to swallow his creamy load of come juice, she had difficulties breathing. She pulled from him and placed her lips about Bob's cock, sucking up and down a few times. Then she had to surface again.

As her eyes opened, she found herself looking at Pamie, who was standing near the edge of the hot tub.

Pamie was in her briefest bikini, and the crotch outlined her sweet cunt. She stood looking down into her mother's face, a small smile playing about her lips.

"What were you doing under the water, Mother?" Pamie asked with shining eyes.