She slumped forward, too weak to sit upright on Billy's cock. Her tits wrapped about his young face as she shivered and whimpered like a small puppy. The heat of Billy's panting breath between her tits told her of his exhaustion, and the splash behind her was Bob falling into the water.

After a few minutes of rest, she slipped off Billy's lap, a soft moan coming form her as his cock pulled free of her cunt. She sprawled on the underwater bench, her head leaning back on the deck, he eyes closed. She smiling, her lovely face glowing with pleasure. Opening her legs beneath the water, she very tenderly stroked her well-fucked cunt.

"That was something, wasn't it?" she whispered, still tired. She slipped her other hand across Billy's hip and cupped his cock and balls, squeezing them gently. Only her head was above water as she turned and kissed his check. "You are a fantastic fuck, Billy," she whispered in his ear, darting the tip of her tongue into his ear. "I suppose you've had a lot of practice, though."

A startled expression came over his face, and he glanced at his brother.

"I showed her yesterday, Billy, remember? I told you all about it."

"I forgot," Billy said.

"Forgot?" Susan laughed, pulling at his cock, stretching his prick playfully. "How could you forget something like that, honey?" To Bob, she said: "You told him everything we did yesterday?"

Bob nodded, grinning.

"And Pamie?" Susan asked.

Again he nodded. "We don't have any secrets, Mom."

Susan gave a low, husky laugh. "I knew you'd tell them, baby."