Late on Sunday evening, Ellie receives a message from her domme. “Are you thinking of me right now?”

Ellie has just turned in for the night. She puts her bedside lamp on and sends back, “Yes, ma’am.” She was. Her domme occupies most of her Free thoughts now. When she’s drifting off to sleep, she often wraps herself up in thoughts of Miriam. Her sensual, womanly body, her lush curves… and her creativity, and her voracious appetite for sexual domination. Ellie likes the warm, comforting feeling of being fully owned by another woman. It constantly turns her on… which, because she’s not allowed to pleasure herself without permission, drives her crazy.

Miriam starts a video call. Ellie scrambles for some headphones. It’s very late, and she doesn’t want to disturb her housemate in the next bedroom.

The video seems to be taken from Miriam’s perspective, in Miriam’s bedroom. The video starts out pointed at a low table, where a forest of BDSM implements is laid out to select from: plugs, dildos, vibrators of all shapes and sizes, clamps, floggers, and things Ellie cannot immediately identify. The video pans across them, slowly. In the background audio, there is the sound of whimpering.

Slowly, the video pans around to Miriam’s bed. There is a very petite, dark-skinned girl bound severely in the center of the bed: Miriam’s other sub, Ellie’s Sister sub, Simone. She is lying on her chest, with a strange sort of black latex mask wrapped around her face, covering her eyes, nose, mouth and ears, but not her hair. Her face is a completely featureless shiny surface, framed by her chin-length bob of silky black hair. It’s a very odd look.

Her arms are tied behind her in a long, elaborate bind, using red rope. The bind pulls her shoulders back and toward one another. Her elbows are roped together, and her forearms and wrists too, so that her palms meet near her bottom. Her legs have been bent double and her ankles tied to her upper thighs with more red rope, making her legs into useless knee stumps. She squirms, helplessly, as Miriam slowly circles the bed, studying her struggling form.

Ellie swallows hard.

The camera moves up beside Simone. “Roll over a little,” Miriam says, and Simone grunts as she obliges. Miriam bends down and focuses on her exposed breast. Simone’s usual barbell nipple piercing has been replaced with a fierce black butterfly clamp. There is a chain which leads from the clamp underneath Simone’s chest, presumably to an identical clamp on her other nipple. Miriam toys with Simone’s clamp a little, then gives it firm tug, pulling her nipple out away from her chest, showing just how tightly the clamp is biting. Behind her mask, Simone whines with what could be pleasure and could be pain. Her voice sounds muffled. It sounds like she’s gagged somehow.

“A pair of my used panties in her mouth,” Miriam explains.

Miriam lets Simone lie flat on her chest again. She moves around to behind Simone, and up between her spread thighs. There is a bright red object lodged in her anus, a butt plug or some sort of dildo. It’s fat, at least two inches across. It’s impossible to know how long it is, how deep inside of Simone’s body it goes, but Simone has a Fetish for extreme penetration, which means it’s probably enormous.

“Up on your knees,” Miriam orders her. “Show the young lady what you’ve got.” Simone raises her Ass up and Miriam focuses down on her Pussy, now, showing that there is a third, identical clamp screwed onto her fat pink clitoris. Miriam gives it a firm tug, just like the one on Simone’s nipple. Simone shrieks with pain. It’s wound just as tightly as the others.

“As you can see,” Miriam whispers, “we’re about ready to begin.”

The whole scene is so erotic, it makes Ellie want to scream. She sits cross-legged in bed, watching on her phone, spellbound. She does not touch herself — she’s forbidden to do that. Her body is Miriam’s. Her orgasms are Miriam’s. Instead she keeps her Free hand behind her back, balled up into a fist, to stop herself. She feels red-Hot. She would give anything to trade places with Simone right now.

Miriam slides one finger into Simone’s Pussy. Simone whimpers and her body undulates against her domme’s hand, and they set up a soft, pleasant rhythm together. Simone’s clit clamp dangles from her raised Pussy, tugging on her clit with its weight, dragging on the bedsheet. It must hurt like hell, but it seems to turn Simone on.

Miriam twists her hand a little, going a little deeper, vigorously stroking Simone’s frilly inner labia. She works fast. She knows exactly what to do to drive Simone wild. Ellie has experienced manual pleasure from her domme many times, but she’s never seen a close-up of what she actually does, not from this angle. Miriam turns away for a second, and dips her hand in a bowl of massage oil on the nightstand, and then continues to stimulate her bound lover, massaging her inner thighs, and then stroking her smooth mons pubis, and then going inside of her, curling her fingers down, looking for her G-spot. She does the whole thing one-handed, holding her phone with the other. She never turns the camera to face herself; Ellie never sees Miriam’s face, or what she’s wearing.

Simone’s gasps become heavier and more urgent. She struggles against her bondage. Ellie is becoming uncontrollably wet. I want to be her, she thinks. I want to be with her. Ma’am has two hands, why cannot she do this to both of us at once?

More lubrication. Another strong tug on the clit clamp, and then Miriam bunches her fist up and pushes it all the way inside of her sub. Simone screams, sharply, then her scream trails off into a moan of ecstasy, as Miriam pushes her hand deeper still, almost to the wrist bone, fingers bunching against Simone’s cervix.

Ellie knew that Miriam fisted Simone on a regular basis, that it was Simone’s absolute favorite. But she almost didn’t believe it was true until right now. Simone is such a small woman, it’s amazing that someone’s whole hand can fit inside of her. It must feel so wonderful, Ellie thinks, to have ma’am so deep inside of you, stretching your Pussy so tight…

Simone closes her thighs up, pulling Miriam in. Miriam fist-fucks her for a long, sloppy few minutes. Lube and juice ooze out from the tight seal Simone’s Vagina makes around Miriam’s wrist. Simone wails continually, with ascending pleasure. And frustration. Her body, like Ellie’s, belongs to their domme. And so Simone, like Ellie, is not allowed to come without permission. In her current state, she cannot even beg for it. What must that feel like?

Ellie knows how it feels for her, at least. “Ma’am,” she begs, “please may I come!”

Miriam ignores her at first. She fists Simone more vigorously, then pulls her fist all the way out, and then drives it in again, and again, roughly. Simone growls, and her body bucks. Her clit clamp swings against her domme’s arm. She loves it.

Then Miriam slows, and withdraws, hand dripping. Simone’s Pussy closes back up. She mewls sadly.

“One of you may come,” Miriam says.

“I choose her,” Ellie says, immediately.

“…You’re sure?”

“Make her come for you, please, ma’am! I want it. I want to see it.”

“…Very well.” Miriam plunges her hand back into her petite sub, and rails her harder than ever. Simone screams, and writhes, and soon comes hard, drenching her domme’s arm with squirted juice, almost hitting the camera. Miriam withdraws, and fondles her Ass. Simone falls limp, Pussy still twitching. Miriam slowly backs away from her, leaving her lying there, contorted and thoroughly pleasured.

Ellie, watching, blushes and trembles with delight. Second-hand, frustrating, vicarious delight. She could have taken the Orgasm herself. God knows she needed it. But how could she let her domme drive Simone to the edge, and then deny her? It would have been too cruel.

It’ll be her own turn soon enough, she knows. Well… she hopes.

“Young lady,” Miriam says, “from now on, when you think of me, I want you to think of this. Us. Of me, railing your bound Sister sub. All night. Every night.”

She ends the call.

*

On Monday evening, after work, Ellie heads to the office gym. There are quite a few people using the gym, although Ellie knows that by the time she’s done the place will be empty except for her. The gym is open twenty-four hours a day, and she normally works out for three hours. No one else stays around for that long.

Ellie turns heads when she works out. In her life, she’s all the time drawn attention because she’s all the time been very tall, and very gorgeous. But when she’s in workout gear, and especially when she’s working out, everybody looks. Today she wears bright blue leggings and a skimpy white sports bra with a strappy back. Her back is a network of muscle. She has abdominals like a stack of bricks, and immense trapezii and deltoids. And, within a quarter-hour of her beginning her workout, every inch of her is gleaming with sweat.

So, it’s impossible not to look. But Ellie ignores most of the attention. She focuses on her workout. She puts on podcasts, and tunes the world out, and works.

Miriam arrives about an hour later. As the office’s executive manager, she works a substantially longer day than Ellie. By the time she arrives the gym is half-empty. She carries her usual kit bag over one shoulder. With her other hand she tows a piece of wheeled carry-on luggage, which, to Ellie’s eye, looks pretty heavy. She gives Ellie a cordial nod as she heads straight for the changing room.

A few minutes later she emerges, changed. She wears her usual black and pink fitness gear, with her hair pinned up into a pony tail. Ellie is in the middle of a set of pull-ups when Miriam approaches her. Ellie stops.

“No, don’t let go,” Miriam tells her. “Are those wireless earbuds?”

“Yes, ma’am.”

“Young lady, I have a podcast I want you to listen to. An educational show, I think you’ll like it. Where’s your phone? Oh, I see it.” It’s in Ellie’s pocket, on the thigh of her leggings. Before Ellie can do anything, Miriam slides a hand in and pulls it out.

It’s locked, of course. “Ah. Unlock this, would you?”

Ellie releases her right hand from the pull-up bar. Dangling effortlessly from her left hand, she takes her phone from Miriam, unlocks it and returns it. Then she takes hold of the bar again.

Miriam pauses Ellie’s podcast in progress. It was about genetics research. She navigates to some other site, finds what she wants, and starts the stream. Then she locks the phone and slides it back into Ellie’s thigh pocket.

Ellie listens intently. “I don’t hear anything.”

“You will.” Miriam turns away, and begins her warm-up stretches.

Ellie shrugs and resumes her pull-ups.

A minute later, the audio finally starts. It sounds like a girl, whimpering softly. Trying to keep it quiet, but failing. It’s difficult for Ellie to be sure — there’s a lot of ambient noise in the gym, chatter, clanking equipment, making it difficult to hear clearly.

Ellie hesitates, hanging motionless from the bar, listening more carefully. Then comes a pleasured moan.

“Oh my gosh,” she says to herself. She glances guiltily around the rest of the gym. Of course, no one can tell what she’s listening to. She looks over at Miriam, who is focusing on her stretches, and studiously ignoring her.

As Ellie continues her workout, the erotic audio continues too. There’s not a lot to it, just a single young woman mewling with sensual pleasure. Ellie’s eyes widen when she realizes that the voice she’s hearing is Simone. Recorded that weekend, maybe? Ellie feels a flicker of arousal, and a throb of envy.

Sometimes Simone falls silent for a long period of time, and sometimes she rises to an urgent gasping. She sounds like she’s alone, somewhere quiet. Nothing else is audible, no second lover, no slurping or slapping of flesh on flesh.

Before long, it becomes clear that the audio isn’t looping. The recording, whenever it was made, goes on for twenty minutes. And then forty. Simone makes many different happy, frustrated sounds. Ellie works out that there must be some sort of toy being used on her, in long cycles. Or maybe several toys, each one producing a different response. Simone is trying to keep quiet, but she doesn’t sound as if she’s gagged. She never, as far as Ellie can discern, comes. It is a long, merciless tease.

After an hour, only Miriam and Ellie and two men are left in the gym, and the erotic audio is still going. Simone is starting to sound exactly how Ellie would expect her to sound after a solid hour of sexual torment without release — tired, and frustrated. Ellie finally manages to intercept Miriam as she’s stepping off the running machine. “Ma’am… this, uh, podcast?”

“Are you enjoying it?” Miriam asks, brightly. “I think she’s really insightful. She just has so much to share.”

“Does…” Ellie looks around. The other guys are on the far side of the gym. They cannot hear. Ellie lowers her voice. “How long does this go on? Does she, you know?”

“Reach a meaningful conclusion? Not if she knows what’s good for her.”

Ellie blinks. “Is this live?”

“Yes.”

“Is this public?”

“No, just us. It’s a private stream.” Miriam pulls her hair apart, revealing a wireless earbud of her own. She’s listening to the stream too.

“So Simone is–“

“Somewhere,” Miriam says. “Streaming, live, for us.” She takes out her own phone and — apparently — makes a call. Someone picks up. She asks, “How are you feeling, young lady?”

“PLEASE let me come, ma’am,” Simone whispers urgently. The audio comes straight through Ellie’s earbuds too, clear as a bell. “PLEASE let me come, I need it so bad, it hurts so good, I’m so Hot for you right now, ma’am, please may I come, please! PL–“

“Thank you.” Miriam ends the call.

Simone goes on pleading for a second after the call ends, and then squeals with frustration. “Thank you, ma’am!” she whimpers to herself. And then her moaning continues.

“She’s tied up?” Ellie asks.

“Restrained,” Miriam says. “With a phone in one hand, and a hidden microphone. And now, listen carefully.” She opens a different app, a collection of sliders and buttons, and drags a slider up. In Ellie’s ear, Simone’s moan of agonized pleasure becomes louder. And louder. Simone tries to stifle herself, but she fails.

“A remote controlled vibrator?” Ellie hisses.

“A lovely big fat cock in her Pussy,” Miriam says. “And this one… is the fatter one, in her Ass.”

Simone makes a different squeak.

“And the egg taped to her left nipple,” Miriam goes on. “And the one on her right…” She plays with the controls, mixing the different pleasures together.

Simone makes more novel and exciting noises. “Oh, please, ma’am!” she pleads, quietly.

“And the bullet taped to her clit…”

“Aick! Mnf! Oh God!”

“And these last three buttons,” Miriam says, dragging all the other sliders down to lower levels again, “give her electrical shocks. Why don’t you give them a try?”

She hands her phone to Ellie.

Ellie hesitates.

“Shock her,” Miriam orders, quietly. “Each button gives her a stronger, longer shock.”

Ellie gulps. “Um. These buttons aren’t labeled. Where are the electrodes on her?”

“Where do you think?”

Ellie shivers. She starts with the first button. Simone emits a sharp yelp, more surprise than pain. The second button produces a louder yelp of pain, followed by a tearful whimper.

Ellie hesitates over the last one.

“She knows it’s coming,” Miriam tells her. “You’re just making the anticipation worse for her.”

Ellie still hesitates.

Miriam snatches the phone from her and pushes the button for her. Simone takes a breath and emits a full-throated scream, she cannot help it. She finishes up with a soft, “Thank you, ma’am, more, please, ma’am!”

Over in the far corner of the gym, one of the guys looks up, frowning. “The hell was that?”

Ellie turns too. She heard the scream. Not just through her earbuds. Simone is here, somewhere? In the changing rooms?

Miriam also turns. “Was that someone in trouble?” she asks aloud, feigning concern. “Ellie, go check it out.”

The guy is walking toward the changing rooms. Ellie hurries past him. “You check the men’s,” she says to him, heading into the women’s changing room. He does as she says.

The women’s room is empty. Lockers, benches, dripping showers. There’s nowhere that a bound submissive could be hiding. Unless… Ellie listens intently.

Miriam arrives at the changing room door. “Find anything?”

Ellie looks under the benches. Under one of them, there’s a piece of purple, hard-shelled luggage. Miriam’s case, which she brought in with her when she arrived. Ellie noticed it, but didn’t question it at the time. Could it be? Surely it cannot be big enough. There’s a double zipper, and it’s padlocked shut.

Ellie kneels beside the case and listens. She can hear Simone inside of it, sobbing with pleasure. Trying to keep it quiet. And, yes, keeping it quiet enough that normally no one in the changing room would notice unless they were listening for it. Ellie presses her ear to the case, and finds she can even hear the vibrators working their evil magic.

Simone shrieks, sharply. Another level one shock from Miriam.

“How can she fit in there?” Ellie asks Miriam, wild-eyed. “She must be folded up so tightly…”

“She is. It’s a very tight squeeze. But she’s a very flexible young lady, and she adores tight squeezes. There’s even room for the phone.”

Ellie can hardly imagine it. “Is she okay? It’s been hours…”

“Oh, she loves it. Just listen.” Miriam turns a few of the vibrators up, and Simone wails with miserable happiness, and then settles again.

Once again, Ellie feels a throb of lust and envy.

“Come on,” Miriam says. “We both have more work to do.” As she and Ellie leave the changing room, the other guy emerges from the men’s room, where he, of course, has found nothing. He looks questioningly at them. “It’s fine,” Miriam reports. “Someone slipped in the Shower and hit her knee, but she’s fine.”

And they get back to it.

As Ellie works through the last third of her workout, Miriam turns the controls up steadily higher. Simone’s moans become longer and more sensual as she nears what could be a climax. Miriam uses shocks to take her down again when she sounds as if she’s getting close.

Eventually the last two guys leave. And then there’s no longer a need to keep things quiet. So Miriam cuts loose, forcing yells and screams out of her tormented sub, who still hasn’t come yet. As for Ellie, she finds the audio experience mind-bendingly erotic, and she becomes hopelessly aroused, and has difficulty concentrating on her exercises.

“Ma’am,” she says to Miriam, “you said you wouldn’t interfere with my workouts anymore!”

“Oh, I’m sorry,” Miriam says. “Is this distracting you?”

“Please let her come, ma’am!”

“One of you may come,” Miriam says, again.

Ellie is red Hot right now. She clenches her fists and says, “Yes, ma’am. Please give her what she needs. She’s been a good sub. She deserves it.”

Miriam wordlessly hands her phone to Ellie.

“Oh. Um.” Ellie thinks for a second. Then she turns the vibrators up. First the clit bullet, halfway. And then the vaginal dildo, all the way, and the Anal dildo, most of the way, and the two nipple vibrators, two-thirds of the way.

Simone shrieks and bellows. It’s very audible now. She’s losing control — she cannot keep it quiet anymore. It’s driving her out of her mind. Ellie slowly drags the clit bullet up, and up, toward maximum. “Please, ma’am!” Simone begs. “Oh, please, please!” And she takes a deep breath, and screams, and struggles, and comes, against her will, hard. Her Orgasm goes on for a long, long time, and it sounds as if it comes with some tears. She is still coming as Ellie, red-faced, holds the phone out to give it back to Miriam.