Move closer and continue watching.

You walk over to the open bathroom door now and peek through the crack. Your mother is kneeling down next to the tub, slightly bent over. You not only notice her running the soap over the boy's chest, but suddenly realize your mother's ass looks pretty good in that see-through robe.

"I'm so sorry I spilled that chocolate on your shirt and pants Billy. We want to make sure none of this becomes sticky on you, now don't we?"

Again, Billy can only muffle his answer, "Err, yes."

She continues to run the bar of soap over his chest and then further down. Lucky for you the door is close to the edge of the bathtub, and you cane see her slowly run the bar acroos his inner thighs and over his pubic hair. She sets the bar donw and places both hands on his chest, lathering up the soap. Then, she slowly moves her hands and the lather down to his crotch, first running along the inside of his thighs. You notice now, his penis is erect and sticking out of the water.

"Well, what have we here?", your mother asks. Billy is too embarrassed to answer.

Then, she wraps her right hand around his cock and begins to slowly move it up and down.

"Mmm. So nice and hard for me.", she says. Billy only mutters "Umph!", as he closes his eyes and arches his body up and his head back.

After no more than a few strokes, Billy comes in a stream that hits the bottom of his chin and down his chest.