Karen was sitting on the couch with her son, and she had taken his cock out of his cut-off jeans. Susan saw Karen was stroking her son's prick, and that Tom was entering into this with enthusiasm. He was playing with his mother's naked tits, his mouth open and his tongue licking at his lips. His cock was very hard in Karen's hand, Susan saw. Despite her first reaction of shamed anger, Susan felt herself becoming intensely aroused. She could not take her eyes from Tom's young prick, or the way Karen was stroking her fist up and down the throbbing shaft.

Although Susan stood in the doorway, neither Karen nor Tom saw her, or if they did, they paid no attention to her.

"Your cock is so hard, darling," she heard Karen tell her son. "God, is it ever hard! And such a pretty one, too. I bet you can do all sorts of things with this lovely, hard cock."

Karen began opening her son's shorts; then she pulled them off so her son sat naked on the couch. Susan's eyes strained at the sight of his prick and balls. Her cunt throbbed in a delicious manner, and she swallowed hard as she gazed at the horny couple.

While Karen once again began to fondle and pump on her son's prick, Susan noticed that Tom was trying to get one hand inside his mother's shorts, trying to get at her cunt.

Karen gurgled and said: "Just a minute, darling. Let me take them off."

Karen stood up and wiggled out of her tight shorts, her back toward Susan. Susan saw Karen's curvy ass revealed, the whiteness of her asscheeks contrasting against the tan of her thighs. Then Karen sat down again next to her son. She took his throbbing cock in her hand again.

"Now you can play with my pussy," she said in a husky voice.

Karen spread her thighs wide, and Tom began to feel about his mother's cunt. Susan could hardly breath as she watched. She was so excited she could hardly stand.

"Oh, baby," Karen gurgled as her son slipped a finger up and down her hairy twat. "Feel me up! God, it's good, your hand on my cunt this way! Mmmmmm, and your cock is really anxious! I can feel it pound in my fist!"