From inside the cabin, Jay was watching his mother through a window screen, his cock in his hand. He squeezed and pumped his prick, eyes staring at the exciting movements of her ass and thighs. He knew what his mother was doing, and it sent shivers of pleasure through him. When he first began to jack off a few weeks before, squirting his young cum juice with force, he had started looking at girls with intense desire, wishing he had one to shove his cock into.

Shellie, not knowing her son was watching her, smashed her throbbing clit into the mat, giving a soft cry of delight as she came. When her ass became still, Jay pounded on his cock in a frenzy, not knowing that his mother, now that her excitement was cooling, could hear his gasping breathing. Shellie knew then that her son had been watching her, and that he was inside the cabin, jerking off wildly.

She wiggled her ass for his pleasure, opening her thighs so he could see the bulge of her cunt inside the tight band of her bikini bottoms. At the same time she lifted up, looking out over the river. One of her tits showed now, and she listened to her son's quick intake of excited breathing.

She shivered in pleasure as she listened to Jay's soft grunt as he came, and then lowered herself back onto the mat, crushing her tit beneath her, but leaving her long legs open.

Later, almost asleep, she heard the door of the cabin open, and peeked.

Jay came out and walked to the side of the deck. She watched him lift the side of his swim trunks and pull his cock out. Arching his hips forward, he sent a long stream of piss into the river. Shellie knew her son thought she was asleep, and the knowledge that he would pull his cock out with her there and take a piss sent a shudder of pleasure through her. Although she could not see much of his cock, seeing him piss created a heat inside her cunt that almost caused her to come again.