"You're really wet, Mom," Tom said. "You're really wet!"

"Of course I am, darling," Karen laughed. "That's because I'm hot, hot as hell!"

"Like last night?" Susan heard Tom say.

"That's right, Tom. Like last night."

"That was fun, Mom," Tom said.

Karen laughed again and pulled his head down to her tits. "Suck them, Tom. Suck my tits! I love it when my tits are sucked on."

Susan watched, horrified, yet excited by what she saw. There was no doubt that her cunt was twitching. When Tom closed his lips around one brown nipple, Susan almost came.

Karen held the back of her son's head as he began to suck vigorously on her nipple, his hand moving up and down between her thighs. Karen gripped her son's cock tightly, pumping furiously, now. She made soft, animal-like sounds in her throat, writhing her naked ass on the cushions of the couch.

Tom pulled his face away from her tit, looking up into his mother's shining face. "Are you gonna jack me off like last night, Mom?" he asked.

So that was what Karen had meant about giving her son a peek into the future, Susan thought. She had jacked her son's cock off.

"I've got a better idea," Susan heard Karen say. "I know where it would feel better."

"Do you mean it, Mom?" Tom asked, excitement filling his voice. "Are you gonna let me…"

Karen laughed sexily. "That's right, Tom. I'm going to let you fuck me."

"Oh, wow!" Tom yelped with excitement. "Come on, Mom! We better go home fast."

"What's wrong with right here?"

"But… Susan, or Robert."

"Don't worry about it," Karen said, and laughed again, taking his balls in her hand and twisting them lightly.

Susan watched in fascination as Karen pressed her son onto the couch, his cock standing straight up in the air. She held her breath when Karen straddled him, and then settled her crotch upon his waving cock. Their position was perfect for Susan to see it all, and she saw Tom's cock enter his mother's hair-lined cunt with ease.