She tried to recall the expression on her son's face, but couldn't. She did not know if it had been shock, surprise, delight. She did, however, recall his cock bulging in his pants as he watched her. She wondered if Robbie had become excited enough to be in his room, pumping his cock now.

He was supposed to be at football practice, not home. He was not due home for another couple of hours. Judy would not be home until dinner time. She was alone in the house with her son, and he had caught her with her finger up her cunt, and he had to be in his room now, pounding on his cock. A boy his age, seeing what he had seen, had to be excited.

With a feeling of excitement and a little apprehension, she walked to his room and found his door open. She stood there and looked in at her son. He had his pants off, wearing only his T-shirt, and his cock was hard. It was very, very hard, sticking up from the curly bush of dark hairs. His head was on his pillow, but he was not touching himself.

"Robbie…" she said, her voice shaking, her eyes devouring her son's throbbing cock.

"You do it for me, Mom," he said, his voice husky.

Karen began to tremble, moving into his room on shaking legs, her eyes burning on his cock. She stopped at the side of his bed, looking down at him, her eyes moist with heat.

Karen leaned over and closed her fist about her son's cock, squeezing it, watching the smooth head bulge, his piss hole flare and drip. She pulled upward on his cock, making her son moan in pleasure. With a little gasp, Karen began to jack his cock, her fist moving up and down swiftly, from the base to the swollen head. She made hot, hissing sounds as she stroked him. Robbie lifted his hips from the bed, pushing his cock into his mother's hot, tight fist, fucking up and down.