As suddenly as they had come, both mother and son slurped with exhaustion.

Susan watched Karen sprawl atop her son, her ass twitching in the glow of ecstasy. Then she watched as Karen slowly got to her feet. Tom's cock glistened wetly.

Then Karen turned and saw Susan standing in the doorway.

"Beautiful!" Karen said, going toward Susan. "That was absolutely beautiful, Susan. I told you I was going to fuck my son, and I did. God, was it good!"

Susan was frozen there. She couldn't even move when Karen touched her arm. All she could do was stand there, staring at Tom's cock and balls.

Karen noticed this. She laughed in her low way. "Isn't that a beautiful cock, Susan? Doesn't it make your pussy twitch?"

Finally Susan found her voice. She turned and stared at Karen. "How could you?" she asked, her voice barely audible. "How could you do that with… with your own son?"

"Damned easy," Karen said. "It was the easiest thing ever. I told you I thought he was interested, didn't I?"

"But… he's your son, Karen!"

"And that makes it all the more exciting, dummy," Karen said. "Don't tell me you didn't get all nice and wet watching. Come on, Susan!"

Tom pulled his cut-offs on, and he didn't look at Susan as he slipped past them, leaving through the front door.

CHAPTER THREE.

Karen spent two hours talking to Susan.

Susan, although excited by seeing Karen fuck her son so enthusiastically, still felt shame. She shook her head vigorously every time Karen asked her a question about becoming aroused, denying it, but it was so shallow a gesture Karen could see through the lie.

Susan sat on the couch, the same couch that Karen had fucked Tom on. Karen sat next to her, still naked, not bothering to slip into her shorts and halter. She spoke in a low, aggressive voice to Susan, urging her to consider their sons as sex partners.