"Yeah, yeah," he sighed, "blow me, baby… Suck that meat… Yeah, that's great…"
Karen sucked him even faster and harder as she felt his strong young boy-cock growing hard in her mouth. It shouldn't be too much longer now before he came. His meat grew thick and hard, stretching her lips painfully, and his cock-head swelled up hugely, butting her throat. She almost gagged, but she kept on sucking.
Mark waited till he had a good solid hard-on before pulling his spit-soaked rod from her mouth. He grinned evilly at her when her eyes widened with surprise.
"But, Mark," she said, "I haven't finished. Don't you want me to bring you off?"
"Sure, baby," he said, "but not that way. I'm dying to test that cunt of yours."
He began to slide down her trembling body, taking care not to let her roll away. Her pants were down to her knees, her pretty blonde muff exposed. He had a clear shot.
"Mark, NO," Karen wailed. "I told you, I don't want to do that."
"And I told you I do," he snapped. "Now just shut up and take it, Auntie, because you're gonna get it whether you like it or not."
Karen fought desperately, but he pinned her wrists down to her sides, and the weight of his body prevented her from rolling away. It would do no good to scream for help. Her husband was miles away at the beach.
"Oh, no, no," she sobbed. "It's wrong, Mark, can't you see that? I'm your Mother!"
Mark paid no attention. He moved down till he straddled her thighs, and then he poked the fat creaming head of his dick between her tightly clenched legs. She screamed and locked her legs together, but she couldn't keep him out. He grunted and pushed till he felt his drooling cock-head slipping into the slick mouth of her cunt.
"Now," he panted, "now I'm gonna get into you, Auntie, and there's nothing you can do about it."
He slammed his hips forward with brutal force, and Karen felt his thick, hard, adolescent prick ripping into her tightly clenched twat. She couldn't keep him out. He plunged all the way in, till she felt him butting her womb.
Mark sighed and let himself down on her. "I'm in now, Auntie," he said triumphantly. "I'm gonna ball you real good. Why don't you just relax and enjoy it?"
Karen sobbed in protest, but as his rigid young cock began to move inside her, dizzying waves of pleasure racked her body. She'd been without a man so long, she'd been so achingly horny, that it was impossible not to enjoy it.
Mark fucked her in hard deep strokes, completely stuffing and filling her starved box with each swift plunge. It was so different from Bill's languid half-hearted fucking. It was the almost brutal rape-like fucking she'd craved for years. Helplessly she began to cream around his deep-thrusting cock.
Mark felt it. He felt her cunt juice boiling around his dick, felt her clinging twat growing hotter by the second. Soon she began to move her hips helplessly, and her breathing got fast and loud. She had a fine cunt, tight and fiery and slick. He was enjoying himself hugely, and he sensed that she was, too, only she wouldn't admit it.
"Good, ain't it, Auntie?" he panted. "You really needed this, didn't you?"
Karen's face flamed. "Nooo," she whined. "No, no, please, take it out of me."
Mark chuckled. "Still giving me the old bullshit, huh? Well, I don't buy it, baby. I can feel you creaming all over me. You dig it, I can tell. You were hot for me."
Karen could have died of shame. Her lust was so obvious, she couldn't even fool a eighteen-year-old boy. He had her number, knew she'd been wanting him. She turned her face to the side and sobbed, hating herself.
"Hey, no crying," Mark said. "That's dumb, Auntie, really dumb. I mean, I'm balling you, right? And there's no way you can stop it. So why don't you relax and dig it? Why cheat yourself?"
Something snapped in her mind. He was right, dammit, perfectly right. She'd done all she could to prevent this incestuous act, but now it was happening, and she might as well enjoy it. Hell, she'd been wanting a lover like this for years.
She relaxed. Mark could feel it. The stiffness went out of her body, and her cunt opened up to his jerking meat. He felt a fiery flood of cream bathing his dick. She reached up and clapped her hands tightly around his ass, pulling him into her. She began to move her wet, hot pussy in time to his strokes.
"Yeah, yeah, baby, that's it," he said excitedly. "Be up front about it, dig it. You know it's good."
He began to fuck her faster and harder, and Karen almost screeched with pleasure. His hard energetic young cock felt marvelous in her long-starved cunt. She dug her nails into his muscular ass, urging him deep into her.
"Ahhhh," she moaned, "ahhhh…"
"Tell me about it," Mark whispered, "tell me you like it… Come on, Auntie, no holding back now…"
His victory wouldn't be complete until she told him how much she liked it. He had to conquer his women completely. He rammed his cock deep into her, giving her the fierce friction she craved. He felt her cream flooding helplessly around his jerking meat.
"Oh, God," Karen whined, "yes, yesss…"
"You like it?" Mark persisted. "Tell me."
"Yes," she gasped, "yes, I love it…"
She felt a brief moment of shame, but it was drowned in the stunning pleasure that rocked her body. To hell with everything else, she needed this hard prolonged fucking. She could worry later, feel guilty later. Right now she wanted to lose herself in joy.
"It's wonderful, Mark," she babbled. "Soooo good… Please, keep fucking me, keep doing it to me…"
Mark grinned broadly. "You bet I will," he panted. "I'm gonna fuck you raw, baby…"
That was a slight exaggeration, but he did bring her off several times before coming himself. He delighted in watching his beautiful stepmother come, in watching the way her normally cool face twisted in a sensual leer, the way her lush body rocked in climax, the way she moaned her bliss. He had mastered her completely with his cock.
Karen knew she was mastered, and she loved it.
She forgot everything else, opened her famished cunt to him, and came joyfully again and again. Finally Mark gave a blissful yelp and pumped his jism into her. Shyly Karen let him rest on her body while he caught his breath.
"Oh, man," he sighed, "far out… Just let me rest a second… Let me keep my cock in you. I'll get hard again real soon, and we'll do it again."
Karen opened her mouth to protest, then wondered why she bothered. The damage was done. She'd fucked her own eighteen-year-old nephew, and she'd loved it. He knew she'd loved it. She couldn't sink any lower than that. Doing it one more time wouldn't change things.
Besides, she wanted it. She'd been waiting years to be fucked like this. As she felt Mark's insatiable young cock growing hard in her again, she creamed eagerly. He jammed his mouth onto hers, worming his tongue inside, and she responded with her tongue, weaving it around his in a lewd dance.
"You ready to do it again?" he said.
"Yes," Karen whispered.
Just then they heard a car coming into the driveway.
"Oh, my God, it must be Bill and Stacy," Karen yelped. "Quick, Mark, get off me."
They leaped apart, and Mark somehow managed to stuff his hugely erect cock into his jeans. He clattered down the stairs to the basement. Karen pulled up her pants and patted her hair into place, blushing hotly.
Bill's arrival had at least restored her to her senses. She'd done a terrible thing, balling her own young nephew. She'd never do it again, she swore.
When Bill came into the house, she greeted him cheerfully but couldn't meet his eyes.
She didn't notice, but he couldn't meet hers, either…
Late that night after Bill and Karen had gone to bed, Stacy sneaked into her brother's room. They hadn't been alone together all day, hadn't had a chance to compare notes. She was bubbling over with the news she had to tell Mark. And she knew he was waiting impatiently to tell her about his own adventures.