Timmy moved his hand, and she held his prick. But she couldn't resist caressing it with her fingers, either. It cut the flow of piss. Donna giggled.

"Come on, Mom," Timmy said. "I gotta piss."

She lowered her hand and cupped his balls, watching his piss flow again. She squeezed the cheek of his ass squealing softly. She moved her hand off his balls and into the stream.

"Mmmmnun, warm," she gurgled. "You really like piss, Mom?"

"Oooo, yes, baby!"

"Then wash your fucking face in my piss!"

"Timmy. I don't know about that."

"Mom, wash your cocksucking face in my piss!"

Donna felt a tingle throbbing at her cunt, an itching sensation that scratching wouldn't help. Her clit had started to swell, and there was a deep pulsing feeling in her cunt lips. Her hand was still cupped a few inches from his cock, but Timmy had stopped the stream of pee. Her palm was wet with piss.

"Wash your face!" he said again.

Donna's eyes flared, fiery and her knees began to shake. With her eyes lowered, she brought her hand to her face and smeared his piss on her cheek.

"More!" Timmy said.

He pissed into her hand again, and Donna once again washed her face.

"Both hands, cunt!"

Donna cupped her hands as Timmy pissed in them then washed her face in the warm piss. She made a soft sob of unexpected pleasure, her knees buckling. She slowly went to her knees, and, while Timmy pissed, she washed her face with pee.

She sat on her heels, her face glistening with piss, looking up at her son, her face pink with shame, but her cunt was throbbing, and very wet.

Timmy turned to face her, and shook his cock. A few remaining drops of piss landed on her face. A whimper came from her throat as Timmy rubbed the head of his cock across her lips slowly. She tasted his piss when one last drop somehow entered her lips.