Marilyn whimpered softly at the now familiar but nonetheless thrilling sight, dropping down onto the bed and reclining slowly onto her back, gazing up at the young boy with an almost desperate desire in her eyes.
Peter sat down on the edge of the bed, his eyes moving wildly over his aunt's nakedly surrendered body. He felt the words in his throat that he wanted to say to his aunt but he couldn't quite bring them to the surface and yet he knew he wouldn't be satisfied until he had performed the vile act that had been haunting him for days now.
"What is it darling," Marilyn asked, aware that her young nephew was struggling with something.
"I want to fuck you in the ass," he said directly, hardly able to believe his own voice.
"No," Marilyn gasped, her eyes widening suddenly in shock and horror. She couldn't imagine she'd even heard him correctly, but she knew she had. And the lewd act he was proposing was beyond anything she'd even dreamed of in her most perverted fantasies. It was sodomy! Pure and simple sodomy, the most warped and sadistic act of sex possible. And innocent little Peter, her darling little nephew was proposing that she, his aunt, submit to that perverted act.
"No," she repeated again, "I'll do anything else Peter darling, but not that, please not that!"
"That's what I thought Auntie, I didn't think you'd let me do it."
Marilyn didn't know what to say as she looked at the dejected form of her young nephew – oh God! – she felt so terrible, why was she denying him his pleasure again, and yet the act he'd asked her to perform was vile, was unthinkable! She started to caress his youthful body but he pulled away from her and somehow or other she felt that she had lost him forever, she just couldn't bear it, why did he have to ask her for this, the most lewd and vile of all the sexual acts. Suddenly though, she knew that she would never be able to deny him anything, he was far too precious to her and if this was what he wanted, she would give herself to him, she would surrender to him as he wished, she couldn't resist him, couldn't refuse him anything he wanted.
"You can fuck me in the ass, if you want to darling, I can't deny you anything," she said quickly, hardly able to look at her young nephew fully in the face.
Almost instantly, Marilyn saw the boy's deflated cock begin to grow, brushing back toward its throbbing erection against her thighs, and she pushed the boy upward to allow her to roll over on her belly. Then she lay motionless, waiting, her eyes tightly closed to hold back the tears, her naked ass-cheeks clenching in fear as she awaited the lewdest and most obscene ravishment she would ever be subjected to in her life.
Peter trembled in anticipation, propping himself up on his elbow to gaze hungrily down the length of his aunt's prone body, his attention finally focusing on the forbidden dark crack of her defensively clenched ass-cheeks. His hand moved hesitantly to her thighs just below the clefts of her buttocks, and he began to stroke softly up between them, running his middle finger up the already lewdly moistened slit of her cunt to spread the flowing cuntal juices back over the forbidden little nether hole.
Marilyn's body jerked with a soft spasm as she felt Peter's finger move across the sensitive membrane, coming into sudden obscene contact with the tightly contracted little circle. In spite of her shock and fear, her body responded spontaneously with a little undulating quiver, and a soft noise that could have been mistaken for a mewl of pleasure issued from deep in her throat. Then a wilder shudder passed through her body as she felt the pressure increase. Her eyes opened wide and she raised her head, staring straight ahead at the wall of her bedroom as she felt Peter's finger slip right down into the little hole, burrowing slowly forward into her rectum in spite of all her attempts to clench her buttocks and contract her anus in resistance. It sank inward to the first knuckle, then continued the lewd intrusion until it was buried all the way up in her helpless rectal flesh.
As a soft moan of pain rose to the older woman's lips, Peter flicked his thumb down into the moistly splayed flesh of her cunt, the striking contrast of sensations silencing her protest. Then her buttocks resumed their sensuous undulation as Peter began to stroke up and down her tingling cunt-lips with his thumb, at the same time probing deep in her rectum with his obscenely piercing middle finger.
As the pain-pleasure sensations increased, Marilyn felt fresh tears rush to her eyes, but at the same time she was unable to stop the soft gyrations of her hips squirming up and down in a lewdly hunching motion on the bed. It wasn't the pain that made her want to cry, but the sudden shocking and devastating realization that in spite of all the perversion, in spite even of the pain, the idea of being fucked in the rectum, debased and humiliated to the limits of warped sex, was beginning to appeal to her. Even as she sobbed, little tremors of masochistic pleasure started to course out over every tingling inch of her goose-bumped flesh, and she could feel the fluttering excitement growing in her stomach.
Then she gasped as Peter began to withdraw his finger, and in spite of the relief, the tight rubbery walls of her inner rectal flesh seemed to cling to it protestingly. Her body jerked from the sharp pop as his finger left her completely, then lurched forward as Peter rolled back on top of her and his finger was suddenly replaced by the blood-filled tip of his cock, prodding right up against the tightness of her helpless anal entrance.
"Aaaaaaagggghhhhh," she moaned thrashing her head from side to side as her nephew lunged ruthlessly forward, his cock-head pressing right against the tightly resisting little rectal opening and beginning to worm itself slowly up inside. The sudden white-hot pain caused new tears to rush to the older woman's eyes as she shivered and trembled beneath her nephew from the raw sensation of the slender shaft of boyish flesh surging hungrily upward into her tight-fitting rectum.
Sobbing from her pain and humiliation, Marilyn dropped back onto the bed, her buttocks still jerking in involuntary spasm from the shattering violation of her most sensitive orifice. She was hopelessly impaled now. Her body was pinned down to the mattress beneath her nephew and she'd taken his surging rod of flesh to the hilt between her reluctantly upthrust ass-cheeks.
Then another cry rose to her lips as Peter began to move. But miraculously, it wasn't really as bad as she had feared. The pain was tempered by an even more vivid sensation of pleasure, however masochistic. Her loins were on fire from the lewd skewering of her rectum and she could feel the tight sac that held the boy's cum-filled testicles slap teasingly against the sensitive little slit of her cunt, sending undeniable ripples of pleasure darting out through her squirming body in delicious contrast to the pain. And as Peter continued to drive smoothly into the rubbery tight rectal flesh, her cries of agony and protest gradually began to change, becoming finally mewls of forbidden pleasure as the young boy began to fuck even harder.
"God, it's tight," he gasped, grunting and groaning and laboring above her. "I'm not gonna be able to take much more. The friction is just too intense."
For a moment longer Marilyn hung in limbo, a part of her longing for Peter to achieve his early climax and end the merciless assault, another part of her beginning to cry out for more and more of the depraved sensation. Then it was Peter who turned the tide. In a sudden movement he slipped his hand in between Marilyn's belly and the mattress, thrusting his finger up between her thighs to stroke in swift little movements right over the hotly pulsing bud of her clitoris, further increasing the confusing contrast of sensation for the older woman. Marilyn sobbed softly, then moaned even louder, suddenly rocking her buttocks back and pulling her knees up beneath her body, lifting Peter into the standard "dog fashion" position. The shift in position better exposed her rectum so Peter could thrust his cock even deeper into the sensitive tightness, and at the same time made it easier for him to reach her clitoris and the pulsating slit of her moistened cunt.