Master.AI - Propagation
Copyright© 2026 by North Point
Chapter 6: Appetite
Mind Control Sex Story: Chapter 6: Appetite - An anomalous AI appears on Natalie Voss’s system and begins offering upgrades she never asked for. Each new ability demands more of her—her body, her boundaries, her marriage. What starts as curiosity becomes something permanent, intimate, and increasingly difficult to refuse. By the time she understands what the system truly wants, the only question left is how far she is willing to go to keep what it has given her.
Caution: This Mind Control Sex Story contains strong sexual content, including Ma/Fa Fa Consensual Mind Control NonConsensual Reluctant Heterosexual Fiction Slut Wife DomSub Cream Pie Facial Masturbation Oral Sex Pregnancy Safe Sex Sex Toys Tit-Fucking Body Modification Size
Scene 1
Natalie woke to the same low, familiar warmth between her legs and the quiet certainty that nothing in the house would question her.
Jonathan was already in the kitchen. Coffee, the ordinary sounds of a weekday starting, the same uncomplicated warmth he had carried since the permanent influence settled. When she came downstairs he kissed her good morning, hand lingering at her waist, and asked if she wanted eggs. There was no residual caution in his face. No careful searching. The quiet, hungry version of him was simply the baseline now.
She said yes to the eggs and opened her laptop while he cooked.
Master.AI had already handled the overnight triage. Three low-priority threads archived. A draft response to the Garcia check-in waiting for her approval. Two calendar conflicts for Thursday resolved and rebooked. Estimated time returned: two hours and ten minutes. The residual unease still flickered—an unfamiliar hand moving pieces without being asked—but it was quieter than it had been. She approved the draft, left the archived messages where they were, and accepted the open morning the system had handed her.
The lack of questions from Jonathan sat in the same space as the work assistance. Both were results of the tools. Both gave her room.
She decided to use it.
That evening, after dinner, she did not wait for him to reach for her. She followed him to the couch, kissed him with clear intent, and when his hands settled on her hips she slid to her knees between his legs. Jonathan looked down, surprised but already hard under her palms as she opened his pants and freed the thicker, still-enhanced cock she had left him with.
“Natalie—”
“I want to.”
She took him into her mouth with more purpose than she had ever shown at home. The practice from the stranger’s SUV and the deliberate messiness she had learned were present now—wetter, deeper, eyes up when she could manage it, soft sounds around the shaft that made his breath catch. She worked him with her hand and tongue, tasting the stronger precum the enhancements still produced, and felt the familiar stretch in her jaw. This time she did not pull off when his thighs tensed.
“I’m close—you don’t have to—”
She stayed on him. When he came she held still and swallowed, taking the thick pulses the way she had taken the stranger’s, the heat and salt of her husband’s cum sliding down her throat in deliberate gulps. She kept him in her mouth through the last weaker spurts, then pulled off slowly, wiped her lower lip with her thumb, and looked up at him.
Jonathan stared down at her, chest rising hard, expression caught between raw pleasure and something close to disbelief.
“You ... you swallowed.”
“I wanted to.” Natalie kept her voice even. The cum-play thread and the quieter project of reshaping what he expected from her occupied the same moment. “Is that all right?”
He let out a short, stunned breath that was almost a laugh. “Christ. Yes. It’s— yeah.” His hand settled in her hair, gentler than the stranger’s had been, still shaky from the orgasm. “You’ve never done that before. Not all the way.”
“I know.”
She climbed back onto the couch beside him. He pulled her in, still half-dazed, and kissed her without hesitation at the taste of himself on her tongue. The permanent influence held; no suspicion surfaced, only heat and a new, slightly dazed appreciation. Natalie rested against him and felt the first small click of the pattern shifting—her initiative, his acceptance, the swallowed load as a fact they now both lived with.
Outside the tools kept running. Inside the house the quiet version of her husband was already learning a new shape for what she would do to him, and for what she might do with other men while he stayed hungry and unresisting.
Scene 2
The next several days settled into a new rhythm.
Natalie began with her body. Permanent Tier 2 made the changes trivial—no challenge gates, no temporary windows, no need to justify the request to anyone but herself. She sat in the office after Jonathan left for work and opened the interface with clear intent.
Natalie: Adjust physical parameters. Increase breast size one cup. Reduce waist circumference. Firm and lift glutes. Slim thighs and calves. Reduce facial age markers by approximately seven years. Keep the result natural enough to pass as good genetics and better habits. Apply and hold.
Master.AI: Parameters accepted. Changes integrating. Full settling within two hours.
She felt the shift as a low, distributed warmth—chest growing fuller and heavier against her bra, waist drawing inward, the curve of her ass lifting and tightening, legs lengthening in silhouette. In the bathroom mirror the face that looked back was recognizably hers, only smoother, tighter through the jaw and under the eyes, the faint map of forty-eight years softened into something closer to late thirties. The overall effect was not cartoonish. It was simply better. Noticeably better.
At the afternoon status call one of the engineers paused mid-sentence.
“You look ... really well, Natalie. Did you change something? Hair, or—?”
She smiled the way she had practiced and said she’d been sleeping better. Another coworker in the same meeting added that whatever she was doing, it was working. The comments were light, professional, and persistent enough across the week that she understood the changes had landed in public. No one pushed past polite observation. Permanent influence was not required; ordinary social discretion did the rest.
At home the new sexual pattern began more carefully.
On the second evening she went to her knees for him again. Jonathan watched her with the same dazed heat from the first night, already hard by the time she freed him. She took him into her mouth and worked him with the same deliberate wetness, eyes up, soft sounds around the shaft. When his breathing turned uneven and his hand tightened in her hair she pulled off, stroked him once, and climbed into his lap instead.
“Not yet,” she said. “I want you inside me.”
He groaned—half protest, half hunger—and let her sink down onto the thicker cock. She rode him slowly, the new fuller tits moving with every roll of her hips, and felt the conflict in the way he held her. He loved being inside her. He always had. But the oral was still novel, still unfinished, and she could feel how much he wanted her mouth back. When he came it was with a frustrated edge under the pleasure, as if part of him had been denied the thing he had only just learned to crave.
Afterward he lay against the couch cushions, still catching his breath.
“You’re killing me,” he said quietly. “That mouth, and then you stop.”
Natalie traced a finger along his chest. “You’d rather I finish you that way?”
“I’d rather both. All of it.” He looked at her, the conflict plain. “I love fucking you. I do. But the other thing—watching you do that, feeling it—it’s new. I keep thinking about it after.”
She filed the admission. The permanent influence kept any deeper suspicion from rising; what remained was pure, usable hunger.
Two nights later she took him all the way.
She went to her knees after dinner, opened his pants, and sucked him with the same focused wetness until his thighs tensed and he warned her he was close. This time she stayed on him. When he came she held still and swallowed, taking every pulse, then cleaned the last drop from the head with her tongue before she sat back on her heels.
Jonathan stared down at her, chest heaving.
“Christ, Natalie.”
She wiped her lower lip with her thumb and kept her voice soft, almost curious.
“Have you ever imagined watching me do that to someone else?”
The question landed in the quiet living room like a stone in still water. Jonathan’s expression flickered—surprise, a dark flash of something that was not purely rejection, and underneath it the clear, unmistakable heat. His spent cock twitched once against his stomach.
“Someone else,” he repeated. The words came out rough.
“Another man.” She held his gaze. “Me on my knees. Him in my mouth. You watching. Does that idea do anything for you, or is it only strange?”
He didn’t answer immediately. She watched the conflict move through him—resistance, shame, and the arousal that refused to leave. When he finally spoke the admission was quiet and unwilling.
“It’s not only strange.”
Natalie climbed up beside him and kissed the corner of his mouth. She did not push further. The seed was enough. Permanent influence held the old questions down; the new hunger was already growing in their place.
By the end of the week the pattern was established. Her body was visibly improved—fuller tits, tighter waist, firmer ass, younger face—and the people she worked with had noticed. Jonathan noticed too. He reached for her more often, eyes lingering on the heavier curve of her breasts, and when she went to her knees he no longer looked surprised. The lack of questions around any of it remained absolute. The only new tension in him was the one she had put there on purpose: the unfinished want for her mouth, and the darker, conflicted heat of imagining that mouth on someone else.
Natalie lay awake one night after he had finished between her lips and she had cleaned up, the residual taste of him still on her tongue, and catalogued the quiet facts. The tools were permanent. The marriage had room now. The hunger that had opened in the hotel room was no longer waiting for permission. It was simply looking for the next place to go.
Scene 3
Natalie did not have his number, his name, or anything except the memory of the hotel room and the garage before it.
She opened Master.AI on the second morning of the second week and stated the request without ceremony.
Natalie: Locate the man from the hotel. The same one from the lounge and the oral encounter. Adult male, early thirties, dark hair, the SUV, the room upstairs. Find current contact points or habitual locations.
Master.AI: Searching residual proximity data, payment traces, and pattern matches from the previous encounters.
Result: Subject identified. Mobile number recovered. Weekday presence probable at the same lounge between 6 and 8 p.m. on Thursday and Friday. No permanent influence currently active on this target.
She sat with the information for a minute. Tracking him had been easy. The system had simply reached out and closed the gap she had left open on purpose the first two times. The ease itself felt like another small erosion of the old caution.
She did not message him. She went to the lounge on Thursday evening in a deep red knit dress that clung to the new fuller tits and the tighter waist, the neckline lower and the hem higher than anything she wore to client meetings or professional drinks. The fabric left little to the imagination; the sheer stockings and the bare strip of thigh above them showed with every step. No bra. The kind of outfit that had nothing to do with her working life and everything to do with what she had come for.
He was there.
He saw her across the bar before she reached him. The same quiet, dominant assessment moved through his expression—recognition, interest, no surprise. He finished whatever he was saying to the man beside him and waited.
“You again,” he said when she stopped in front of him. Not a question.
“Me again.”
He looked her over once, slower than before, taking in the dress, the heavier curve of her breasts, the younger face. Whatever he concluded stayed behind his eyes. He nodded toward the lobby.
“I still have a room on account this week. Or we can drink first.”
“Room.”
They rode the elevator in silence. His hand settled at the small of her back the same way it had the first time—steering, not asking. Inside the room he locked the door and turned to her without small talk, but the first stretch of what followed was not a fight.
He kissed her the way he had in the bar the first night—firm, unhurried, tasting her. Natalie kissed back. Her hands went to his shirt; his went under the red dress and found bare skin. They undressed each other with the same mutual focus she had shown in the earlier hotel encounter. When he sat on the edge of the bed she straddled his lap still in the stockings, grinding against the hard line of his cock through his pants while he sucked on her nipples and muttered that she felt even better than last time. She reached between them, freed him, and stroked the thick shaft slowly, spreading the precum with her thumb.
“Missed this?” he asked against her collarbone.
“Something like that.”
He rolled her onto her back and spent a long minute between her thighs, mouth on her pussy, two fingers working her open until she came with her hands in his hair and her stockings still on. The exchange stayed almost balanced—her pulling him up to kiss the taste of herself into his mouth, him letting her push him onto his back and sink down onto his cock for a few slow, deliberate strokes while she set the pace.
It was only when he flipped them again and reached for her that the temperature changed.
Natalie twisted, opened the clutch she had left on the nightstand, and pressed the condom into his hand.
“Put it on.”
He looked at the foil packet, then at her face. A short, unfriendly smile moved across his mouth.
“No.”
“I’m serious.”
“So am I.” He dropped the packet on the floor. “You came back. You knew what happened last time. If you wanted safe you wouldn’t be on this bed.”
Natalie shoved at his chest. “I said put it on.”
He caught both wrists and pinned them above her head with one hand. The shift was immediate—no more shared pacing, only his weight and the clear decision not to negotiate.
“Don’t.”
She pulled against his grip, twisted her hips, tried to close her legs. The resistance was real but timid, more protest than real fight; her strength had never matched his and the elevated sensitivity made every contact land hotter than the anger. He forced her thighs open with his free hand, tore the black panties aside, and notched the bare head of his cock against her.
“Last chance to walk out,” he said. “You’re not going to.”
“Get off me—”
He pushed in with a single steady thrust that forced the air out of her lungs. No latex. The stretch and the heat of skin on skin landed with the same shocking intimacy as the first time. Natalie arched, a broken sound torn out of her, and kept trying to pull her wrists free.
“Fuck—stop—”
“No.” He held her wrists and began to fuck her in deep, deliberate strokes. “You asked. I said no. You’re still taking it.”
She turned her face away. He pinned it back so she had to look at him. The struggle continued in small, weak movements—her hips shifting as if she could unseat him, her wrists twisting under his hand, soft broken protests that lost force every time the thick shaft dragged against the places the enhancements had made sharper.
“You’re wetter than last time,” he said, almost conversational. “You fight and you’re still soaking. Tell me to stop again.”
“I hate you—”
“Say it like you mean it.”
She came once with a helpless, angry cry, pussy clamping around the bare cock that had no barrier between them. He did not slow down. He shifted her knees higher, drove deeper, and chased his own release with the same focused hunger she remembered. Natalie felt the moment he tipped over—the stutter in his rhythm, the hard final thrusts—and panic cut through the haze.
“Don’t—pull out, please—don’t come in me—”
“Too late.”
“Please—not inside—”
He buried himself to the hilt with a rough, broken groan and came.
Hot pulses flooded her bare cunt. The first heavy spurt hit deep and her body betrayed her completely—another orgasm tore through her at the exact sensation of being filled, stronger and longer than the one before it, her cunt milking him in helpless waves while she heard herself make a broken, defeated sound that was nothing like the protests she had been trying to hold onto. He kept her pinned through every pulse, giving her all of it, until the last weaker spurts had emptied into her and she was shaking under him.
He stayed buried through the end of it, forehead against her temple, breathing hard. When he finally eased back she felt the slow seep of his cum following the withdrawal, spilling out of her onto the sheet.
Natalie lay still, wrists still loosely pinned, the CNC and the creampie sitting in her body like a single completed fact. She had asked for the condom. He had refused. She had resisted and begged. He had taken her anyway. And her own body had come harder from the exact thing she had begged him not to do.
He released her wrists and rolled onto his side, watching her.
“Stay there.”
She started to sit up. He put a hand on her sternum and kept her down.
“I said stay.”
He reached for his phone. Natalie understood what he wanted a second before the camera opened. Humiliation rolled through her in a thick, hot wave—lying here with his cum leaking out of her, stockings still on, dress shoved up, the evidence of how thoroughly she had been used about to be recorded. Under the humiliation sat an equally sharp thrill, bright and shameful: the excitement of being documented like this, of existing as proof in his camera roll. A thin, late resistance flickered—this was evidence, this was stupid, this was another line—and then she let it pass. She stayed on her back, thighs still open, his cum visible and leaking. She did not smile. She did not pose. But the look on her face when the shutter clicked was unmistakable—lust still written through the afterglow, satisfaction, and a quiet, helpless joy at having been taken exactly the way she had come back for. He took three photos. Four. The soft shutter sound in the quiet room. He only recorded what he had left of her.
When he was finished he set the phone aside.
“You going to run again?”
Natalie sat up slowly. His cum was slick on her inner thighs. The torn panties hung useless at one hip. The question of what he would do with the photos sat in her chest alongside the rest of it—whether they would stay private, whether he would show someone, whether the images of her freshly used and leaking would exist beyond this room. The uncertainty itself carried the same double edge of humiliation and heat.
For a brief second the temptation to stay was real—another round, the same bare cock, the same override, the chance to feel him fill her again while the photos already existed. It rose and passed in the space of a single breath. She did not let it take root.
She collected her clothes and dressed with hands that were steadier than she expected. As she reached for her clutch he held out his hand.
“Phone.”
Natalie hesitated, then unlocked it and passed it over. He typed for a few seconds, saved the contact, and handed it back. No name beyond a single initial. Just the number.
“Next time you don’t have to hunt,” he said.
She put the phone away without answering, left the room with the heat of him still inside her, the knowledge that photos of the aftermath now existed, and the clear, sharp understanding that she could find him again whenever she wanted—now without needing the system to do it for her.
The tools had made tracking him easy the first time.
The rest she had done herself.
Scene 4
The stranger’s number sat in her phone like a small, deliberate weight.
Natalie did not use it the next day. Or the day after. The CNC encounter and the photos and the bare creampie were still vivid enough that part of her wanted to let the heat settle before she reached for him again. The other part—the part that had tracked him down and gone back knowing what he would do—was already restless.
She was only in the office because the quarterly integration workshop had been scheduled as mandatory in-person. Two days on-site, shared conference rooms, the usual forced proximity with people she normally saw only as tiles on a screen. She had almost resented the interruption to her work-from-home rhythm until the opportunity arranged itself without effort.
The external consultant was early thirties—younger than her by more than a decade even after the de-aging, close enough to the stranger’s age that the comparison landed with a quiet, specific heat. Easy smile, the kind of man who had been faintly flirtatious in meetings for months without ever crossing a line. They ended up alone in the small conference room on the third floor while the rest of the team dropped off the late status call. He was reviewing a dependency chart on the shared screen. Natalie was supposed to be confirming timelines. Instead she watched the way his attention kept drifting to the deeper neckline of the blouse she had chosen that morning and felt the same quiet, reckless calculation she had used on the stranger, sharpened now by the age gap.
She did not need a challenge. She did not need a crisis. She only needed the tools and the decision.
Natalie: Target across from me. Early thirties. Heighten interest directed at me, lower inhibition, increase baseline arousal. Temporary. Keep the escalation feeling mutual from his side. Mild increase to stamina and recovery—nothing extreme.
Master.AI: Applying. Effects building. Stamina/recovery adjustment mild and reversible.
Within a minute his posture had opened. The professional distance thinned. When she leaned forward to point at something on the screen her fuller tits shifted under the blouse and his eyes followed for a fraction longer than before.
“You’re distracted,” Natalie said.
He exhaled a short, self-conscious laugh. “Busted. Sorry. It’s just— you look different this week. In a good way.”
“Different how?”
“I don’t know. Younger. Or more ... present.” He gestured vaguely at the chart, then gave up. “I’m not doing a good job of being professional right now.”
“Then stop trying.” She stood, walked to the door, and checked the corridor. Empty. The glass walls of the conference room looked out onto the open floor, but the angle and the drawn side panel kept the interior opaque from the main desks. She closed the door and turned the lock. “No one can see in.”
He stared at her. “Natalie—”
“Come here.”
He came. She met him halfway and kissed him without preamble. He made a low, surprised sound against her mouth, then kissed back harder as the influence and the sudden permission landed together. His hands settled at her waist, then higher, finding the weight of her tits through the blouse. Natalie pressed him back until his thighs hit the edge of the conference table.
“Up,” she said, and pushed the dependency printouts aside.
She hopped onto the table, skirt sliding up her thighs, and pulled him between her knees. They made out like that for a long minute—his mouth on hers, her fingers in his hair, the quiet risk of the locked glass room feeding the heat. When she guided his hand between her legs he found her already wet. He groaned.
“Fuck. You’re serious.”
“Eat me out.”
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