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The Machine's Mercy

by @infin8fun
5 chapters
~13 min read

Thomas Blackwood's workshop isn't for fixing machines—it's for breaking limits. Rachel, pale and freckled, trusts her friend enough to let his restraints tighten, his insertions stretch, and his vibrations push her past multiple orgasms into the territory where pleasure and endurance blur. She always survives, but only barely.

MEET THE CHARACTERS

TB

Thomas Blackwood

A 48-year-old precision engineer whose workshop has evolved into something far more intimate—a laboratory of restraint and endurance. He has silver-threaded dark hair, sharp blue eyes that miss nothing, and the steady hands of a man who builds his own machines. There's no cruelty in him, only curiosity; he watches each woman find her edge with the quiet reverence of a sculptor discovering what marble can become.

RO

Rachel O'Sullivan

A 24-year-old redhead with pale, freckled skin that flushes pink at the slightest provocation and a body built for endurance—tall, fit, with full breasts and the strong thighs of a former swimmer. She's Thomas's friend, curious enough to volunteer, stubborn enough to see it through, and entirely unprepared for how deeply the machines will reach into her. Her green eyes go wide and glassy when she's pushed past thinking into pure feeling.

HK

Heather Kowalski

A 26-year-old with dark, wavy hair and a full, soft body that makes her look gentler than she is—she's the friend who reads the fine print, who knows exactly what she's walking into and chose it anyway. Shorter than Rachel, with brown eyes that sharpen when she's assessing a machine's mechanics, she's drawn less to sensation than to the geometry of surrender: the precise angle of a suspension line, the weight distribution of a predicament. She wants to be held in place so completely that even thinking becomes optional.

AC

Aimee Callahan

A 34-year-old strawberry blonde with fair, luminous skin and the soft, full curves of a woman who recently gave birth—she's still learning her new body, still startled by the weight of her breasts and the tenderness that lingers. She accepted Thomas's invitation thinking it was a wine-and-engineering tour, and now she's tied to a chair with her blouse open and milk beading on her nipples, mortified and achingly aroused. She discovers, to her own surprise, that she has no bottom edge—she takes every inch, every stretch, every vibration, and asks for more with her eyes before her voice catches up.

EXPLORE CHAPTERS

1

The Chair Accepts Her

The leather is cool against Rachel's bare back as Thomas cinches the last strap across her thighs, her wrists locked to the armrests, her pale freckled chest already rising fast. He fits the curved acrylic cups over her breasts and turns the dial—the plates press together, flattening her nipples against the clear surface, and she watches her own flesh spread pink and wide. Below, the first silicone rod rises from the chair's center, slick and warm, nudging against her entrance without entering. Thomas's thumb rests on a second dial, his blue eyes on her face, waiting for the nod she hasn't given yet.

2

The Question Lingers

Rachel sets the empty mug on the stool beside her, her fingers still trembling slightly, and looks at Thomas across the workshop's dim light. He hasn't moved from his stool, his own tea forgotten, his blue eyes fixed on her with an intensity that makes her skin prickle. 'When can I do it again?' she asks, and the words hang in the air between them, heavier than she expected. Thomas sets his mug down slowly, deliberately, and stands—not to answer, but to cross to the workbench where a leather-bound notebook lies open, its pages filled with his precise handwriting. He picks up a pen, makes a single note, and turns back to her with a look that says the answer is more complicated than a date on a calendar.

3

Chapter 3

Chapter 3 moves to Heather, Rachel's friend, who contacts Thomas early. Even though he'd agreed to let her watch Rachel on Saturday, she sets up an appointment for Thursday evening where she agrees to try out a different machine for Thomas. This one is a mix of the Medieval Stretching Rack. Being held immobile scares her, but she pushes through, allowing him to take the lead. The second phase of this machine adds a blind fold since Thomas thinks she's anticipating too much, he adds impact play, soft strikes across her entire body. She really enjoys soft strikes against her crotch. Phase 3 mixes in harder strikes across her back, buttocks, and thighs, mixed with medium hits across her breasts and nipples, eventually bringing her over the edge from the soft repeated impacts on her crotch.

4

Saturday Arrives

Rachel's bare back presses against the cold steel of the chair as Thomas's fingers work the first strap beneath her breasts, cinching it snug across her ribs. He adjusts the second strap above her bust, pulling the leather tight enough to lift and separate, her pale skin already flushing pink where the edges bite. 'The compressor runs for three minutes before the inflator engages,' he says, his voice level, his thumb tracing the line of the strap. 'You'll feel the pressure build before the machine adds volume. Tell me when the compression alone is enough.' Rachel's hands grip the armrests, her breath shallow, her nipples already peaked and sensitive against the leather. She lets the compression be a little too tight, the inflation is so intense. Thomas doesn't stop her, she thinks he let it go to far, but it's not too much, just almost. Heather sits and watches Thomas and her friend. She notices her seat has attachment points for wrist bindings, an indent for a vibration pad under where her bottom goes. After Rachel is attached done with the first cycle, the softest cycle, Thomas asks Heather if she'd like the rest of the pieces of the chair added. (wrist restraints and vibrating pad perfectly placed under her mound.) She doesn't answer verbally, but blushes, and nods. After getting her chair setup and her tied down he leans in and says she doesnt get the blindfold, she's here to watch Rachel. Thomas comments that he knew Rachel would go a little farther, a little harsher, to see if he'd stop her, but he knew she could take it.

5

Chapter 5

About an hour after Rachel leaves, Aimee contacts Thomas. She's a single mother, knows she doesn't have time to add a new man in her life, but Rachel has told her a little about the first visit, she thinks she knows everything that Thomas will do. Aimee tells him Rachel told her everything, and that she wants everything he did to Rachel. He comments, that didn't take long. He's researched her and talked to Rachel about her, enough that he knows about her child. He says if she's sure, he can set everything up for Sunday afternoon, but she needs to make sure she has someone to watch her child in case it takes longer than she expects. Thomas is planning on giving her Rachel's Saturday experience, but Aimee only knows about her first time on the chair. Sunday afternoon, Aimee arrives, seems nervous and wants to skip small talk, says she's ready. Thomas prepares her for Rachel's full experience from Saturday. She's embarrassed by the breast binding, but doesn't stop him, assuming this is what Rachel went through the first time. Thomas asks her if he can try a new attachment, she quickly agrees without asking the full details. As she's installed on the chair, she starts to lactate, but doesn't say anything about it, as she's embarrassed. The attachment Thomas is using for the first time starts very thing, but can be inflated to the size of a small football. As the breast bindings inflate she starts to leak more and is embarrassed. As the devices push her, she can't orgasm, but is really enjoying herself. When it goes from phase 2 to phase 3, the intruder deflates and the vibration pad pushes her over to a huge orgasm. She squirts from both her breasts and her crotch.