Susan gazed hotly at the way Karen's naked ass pumped up and down, the cheeks flexing. She watched the dark hairs cling to Tom's prick. It was the most exciting thing she had ever seen, and she stood there, firmly rooted to the floor, unable to turn her head away. She was breathing hard and fast, and she felt as if she would come just by watching. Her pussy was quivering insanely, and the insides of her thighs were moist. Her hips swayed gently, and she was gripping one of her tits as she watched. It was fascinating to her, intensely exciting.
Karen slowed her hip movements, then stopped. She sat up on her son, her cunt still around his cock.
"Don't stop now, Mom!" Tom protested. "Don't stop now!"
Karen laughed. "I'm not going to stop, baby," she said. "I'm just getting started."
She sat on him, her ass spreading. Susan saw Karen manipulate her own nipples, the expression on her face twisted in ecstasy. Susan gazed with unfocused eyes at Karen sitting on her son. Although her vision was blurry, she saw in detail the way Tom's young balls seemed to writhe, the base of his cock being gripped by his mother's wet cunt.
Then Karen began to bounce her ass again, bracing herself with her hands on each side of her son, her naked tits jiggling. Susan watched Karen's ass rise and fall slowly at first, then the movement increased in speed. Karen was mewling loudly, her head thrown back and eyes closed as she bounced up and down on Tom's cock. Tom was grunting, his fingers digging into his mother's thighs up close to her hips. His lips were clenched tightly.
"Ohhh, baby, baby!" Karen whimpered in a tight voice. "I'm going to come, baby! Oh, God… I'm going to come!"
Her ass began to grind in a frenzy against her son's deeply buried prick, and then she yelled. The sound came out in painful ecstasy, her naked body shuddering. Susan saw Tom arch his cock upward, and then his balls drew tight against the base. Susan saw his balls flex tightly.
"Mom, I'm coming!" Tom shouted. "I'm coming, Mom!"
"Oh yes! You're coming, baby!" Karen replied in a voice that sounded strangled. "I feel you coming! I feel your cock… coming! You're coming in Mother's cunt… come in my pussy! Oooo… oh, baby, baby! Come in me! Flood my hot fucking cunt! Spurt it into my wet pussy!"
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.
"You aren't the kind of woman who would climb into bed with just any man who happened to have a hard-on, and neither am I, Susan," Karen told her. "But on the other hand we're a couple of hot-assed women who want fucking on a regular basis."
"I won't!" Susan said loudly. "I won't do it, Karen."
"Then don't do it," Karen said in exasperation. "Be stubborn about it. Go through the rest of your life playing with yourself. But that isn't what I'm going to do. You just saw what I plan on doing. Now that I know without a doubt that my son is eager to fuck me, that's what I'm going to keep right on doing – fucking him."
Susan leaned over, her face in her hands.
"And something else, Susan," Karen said, putting her arm around Susan's shoulders. "I'm taking a good look at Robert."
Susan sat upright. She turned and stared at Karen. "Robert oh, no!"
"I have a strong hunch that boy is just as eager to get a little pussy as my son was," Karen said. "I've seen him look at you, and me too, for that matter. I believe Tom and Robert are thinking the same things. I know they do a lot of talking about girls, about fucking. I've listened in on some of the things they talk about, and let me tell you, your own son is just as horny as mine."
"Karen, you won't!" Susan gasped, her eyes wide. "Robert isn't old enough for that."
"He's old enough, Susan," Karen went on, pulling Susan against her. "Listen, doll I've broken the ice for us. I can have all the cock I want now with my son. You can fuck him, too, and I'd love that. But you've got to go along with it or it won't be any good."
"But they're so young," Susan protested.
"Youth has nothing to do with it." Karen argued. "Besides, they'll be good for us. Where else could a couple of hot-assed girls like us get all the fucking we want with a couple of horny teenagers?"
"It's incest, Karen."
"So what?" Karen continued. "Who would ever know except the four of us? We wouldn't have to keep on using our fingers every night. We could have a ball, Susan!"
At the end of the two hours, Susan was worn down. What Karen said made a great deal of sense to her. She had been on the verge of going out, finding herself some man. But that could lead to problems, she felt.
"But I won't do it with Robert," she insisted. "I refuse to let my son fuck me, Karen."
Karen laughed. "But Tom?"
Susan's face flushed as she nodded slightly, taking a deep breath. "I'll think about that."
Karen hugged her tightly, kissing her lips. "You'll see, honey," she said. "You'll see how much fun we can have."
"But not with Robert," Susan insisted.
Karen made no reply. She stood up and began to get into her shorts and halter. Susan sat on the couch, watching, troubled. After she was dressed, Karen leaned over and held Susan's face up, her fingertip at Susan's chin. She looked into Susan's clouded eyes. Then she kissed her again.
"I'll come over in an hour or so, with Tom," she said.
Susan watched her friend leave, noticing Karen's ass seemed to sway in a more pronounced manner. Alone in the house, Susan wondered what had made her agree to such an insane idea. She tried to analyze her feelings, and the vision of Karen fucking her son came to her again. She could not deny the excitement she had felt at the time. She remembered how hard Tom's cock had been, how beautiful it had looked sliding into Karen's hairy cunt. She tried to imagine what it would feel like to have his cock inside her cunt and she felt a burning twitch of eagerness between her thighs.
What was it Karen had said just before she left? That she would be back in about an hour… with her son. Susan shivered. She had watched Tom grow these past five years, saw him as just another growing boy. But now she realized he was not a little boy any longer. Young, of course, but that cock of his was something else.