Content Warnings: BDSM Fantasy, Non-consensual, F/f, lesdom, bondage, strap-on sex, harem, bondage slavery, Bianca’s Penthouse

The gym in Bainca Lanese’s penthouse was large enough for three people to comfortably use at once. It was generally used by one of Bianca’s women at a time, but it wasn’t uncommon for a second or third person to step in to use the equipment before the first was done. There were often even several times a month when a fourth person had to wait for someone to leave before they could use the room.

Bianca Lanese often used the gym in her penthouse alone. Not necessarily by choice, but because she often exercised elsewhere and because her harem of captive women knew when she liked to use it and did their best to avoid her. It was just as well. Bianca couldn’t spend all her time ogling her pets.

That was probably why Copper, as the gym’s sole occupant, didn’t look up when her owner entered.

On that sunny Saturday morning Bianca decided to do her workout a bit earlier than usual. Besides, today was the day Bianca was scheduled to work on her abs. She was wearing a simple pair of black workout pants that stopped just below her knee, a compression top and a loose gray workout shirt over it.

Bianca was typically the only person allowed to wear more than a sports bra above the waist when she was using the gym.

The Mistress of the Penthouse waited for Copper to finish her time on the treadmill before speaking. Copper’s workout clothes were a vivid lime green color, with black piping. Bianca enjoyed the way the tight Lycra material clung to her running pet’s body as Copper exerted herself. Her eyes were drawn to the center of Copper’s back where her sports bra was nice and snug, to her straining legs in motion, and to the sweaty sheen on her bronze skin tone.

It wasn’t until Copper was slowing to a stop that Bianca set her glasses off to the side and prepared to begin her own routine. She wasn’t looking when she heard a sudden, fearful hitch of breath.

“Hello Copper. How far along in your routine are you?” She asked her pet. Copper was staring at her, eyes wide, too stunned to glance away but not too out of it to respond.

“I’m… about halfway done, Mistress. Almost half.”

“Good. Finish your workout. And then strap yourself in.” Bianca was no longer looking at her pet as she gave the order. She was already busy accessing the penthouse intercom on her smartwatch.

“Maids,” her voice sounded outside an instant out of sync with her actual words. “Finish what you’re doing and come to the gym. It’s Ab Day and one of you needs to help Copper strap herself in for me.”

It was only then that she turned to Copper, who was tentatively inching her way toward her next scheduled workout.

“How‘s the new treadmill?” It had been set up the day before, when Bianca was at work.

“I—Uh, it’s good. It speeds up faster than I’m used to, but I think it’s supposed to be like that, so… it’s good.”

Bianca nodded, then waved the woman off to finish her regimen while she started her own. She wanted to focus on getting through her routine without spending too much time staring at the very available, very fetching slave girl in the room with her. There was a reason Bianca’s pets tried to avoid sharing the gym with her. If it wasn’t Ab Day Bianca probably would have interrupted her own workout to throw Copper to the ground and put the slave’s tongue between her legs.

But she didn’t. Today Bianca found it easy to focus on herself and get her exercises done. Soon she herself was sweaty with effort, and the pleasantly unpleasant tiredness of a good workout set in.

For Copper’s part, it was easy to see that Bianca had destroyed the slave’s focus by stepping into the room. Her progress was slow, and Bianca caught her pet shooting glances at her owner far more often than Bianca checked her out. It made the wealthy woman chuckle.

Bianca was about halfway done, and Copper nearly done, when a maid finally stepped into the room. It was Sky, the redhead who had been a flight attendant when Bianca met and bought her. She had a talent for being seen and not heard, enough that Bianca didn’t even see her enter at first.

Sky thought her ability to keep her head down and avoid attention was the best way to protect herself, but in reality it left Bianca increasingly less interested in her. She would probably be selling the redhead on to a new owner soon.

But today Sky gave her Mistress a polite bow before going to stand and wait at the bondage bench for Copper to finish up.

Bianca watched for that moment. She saw Copper come to a gradual stop with her final exercise, and then steel herself a bit before walking over to the only piece of outright bondage equipment in the gym.

From then on, Bianca didn’t look in that direction. She heard the little noises of effort as Copper maneuvered her back onto the padded bench and allowed Sky to strap her in. The bench was a metal frame with adjustable parts. Someone could lay on their back or their front before being bound snugly in with their legs raised in the air, or the legrests could be rotated down so a person could lay kneeling on their stomach instead. Sounds of metal being pushed and pulled at as Copper tested her bonds were unmistakable.

“Do you want me gagged?” Copper’s frustrated voice abruptly called out. It had to be her, maids weren’t allowed to speak unless Bianca spoke to them.

“Yes,” Bianca answered, still without looking at the slaves. She listened for the telltale sounds of a gag going in, and smiled when she heard Copper’s inevitable little grunts and moans as her mouth was filled.

It wasn’t too much longer afterwards that Bianca was ready.

Her abs were always the last thing Bianca exercised on Ab Day. She had always believed in saving the best for last.

Looking over to the bench, Bianca finally saw how Copper was bound to it so tightly. Her back and head were flat on the padded main deferment, her legs raised up and sinisterly strapped to the appropriate attachments. From those details alone the setup almost looked like a gynecological chair. But those didn’t normally have space for the arms to be bound. Right then Copper’s were flat against the sides of the bench, beneath the main segment. There was a white whiffle ball gag in her mouth. She was naked from the waist down, her discarded pants and shoes in a heap beside the bench.

And as Bianca drew near, Sky was already waiting with the silicon strap-on ready in her hands.

Bianca generally preferred to watch her pets use strap-ons on each other over using them herself. They didn’t stimulate her enough to satisfy her. But over the years she heard enough jokes about how great of a workout using one could be that she decided to try it for real. Now Ab Days were her favorite part of her workout routine. They weren’t the only time Bianca was scheduled to work on her core. She had a few different stretches and strengthening techniques she rotated in and out every day. But too much of a good thing could spoil it, so her favorite way of exercising her abdominal muscles was done at most once a week.

Bianca didn’t even look at Sky as the maid leaned in to strap it onto Bianca’s hips. Her eyes were focused on Copper. Bound, ballgagged, and waiting to receive her owner’s attention.

“It’s been awhile since you helped me on Ab Day, hasn’t it Copper?”

Copper was resolutely staring at the ceiling, but she didn’t dare ignore Bianca entirely. She gave her owner a mute nod.

“Look at me.”

It took a moment, but Copper did as she was instructed. To no one’s surprise, she was glaring at Bianca. She was visibly trying to keep herself calm, but her eyes were full of impotent fury as she met her captor’s gaze.

It was becoming more common to see this kind of glare from Copper, even more so than when Bianca first ordered her abduction. It was a bit of a surprise, to be honest. Along with Flora, Copper had been with Bianca the longest. Most pets had that kind of anger trained out of them by now, but Copper’s had been growing in recent months.

Bianca was curious about that, but not so much to give her pause. She had to finish her workout routine, after all.

“I always forget how many reps I’m supposed to do,” Bianca said as Sky finished setting up the strap on. Bianca tested it, wriggled her hips and tried to dislodge it with her hands. It held. “I have it written down somewhere, but it’s such a fun exercise that I always forget all about that part once I get going.”

Copper seethed. Her glaring eyes narrowed.

Bianca smirked, never taking her gaze off her pet’s angry face. It was adorable. “I’m so glad you understand.”

She stepped forward, took a moment to position herself for the workout, and began.

At first her pumping was slow and deliberate. Bianca kept her eyes on Copper’s until the younger woman couldn’t take it and shut her eyes.

Gradually, Bianca picked up the pace. It wasn’t long until she felt a new burn in her core, growing in tandem with the more pleasurable heat building between her legs. By the time she was done, she would need another tongue to finish things for her. That was why Sky was waiting at attention in the corner of Bianca’s eye.

The thrusting motions were coming fast now, and hard. Copper had been trying to keep resolutely silent, but soon enough she began to grunt in discomfort. Before long Bianca heard more of a whining sound escape her pet. Hardly a surprise. Bianca couldn’t imagine that many people might enjoy being reduced to a piece of exercise equipment. Because then and there, that’s what Copper was. Equipment.

“Oh God,” Bianca heard herself say. Oh yes, she was enjoying herself. Intoxicated by the simple fact of what she was doing. Copper was Bianca’s property, a mere thing to be used however and whenever she wanted. So was Sky, obediently waiting off to the side for her turn to be her Mistress’s sex toy.

Bianca had been gripping Copper’s legs. Now she leaned in and grabbed at her hips, enjoying the little shakes and shivers she felt beneath her pet’s taut sides as Copper instinctively resisted her captor’s touch before forcing herself to accept it.

What would Copper be doing right now, if she hadn’t caught Bianca Lanese’s eye? She used to be a college girl, Bianca recalled. Originally from Michigan, Copper had crossed state lines to seek a degree only to be torn away on the whim of a woman who wielded more power than she ever could have hoped to attain. Reduced to being nothing more than a pet and, occasionally, equipment.

Copper was swearing by the time Bianca leaned in even further to grasp at her breasts. Screaming out curse words and defiances beneath her gag. It was all too incoherent to be fully understood, but the basic gist of it was clear enough. There would have to be a punishment later. A week of maid duty, for starters. It was another week or two until Copper’s turn, but she could jump ahead in line and move someone else a week back.

Finally, when only adrenaline was keeping Bianca from stopping her pumping in sheer exhaustion, the heat between her legs was too much. Bianca abruptly pulled herself away from the strapped-in slave girl and turned to Sky, who was already moving to kneel down and undo the strap on. Once it was off she dropped down to her back, mouth already open to receive Bianca’s folds as the wealthy woman went down to her own knees, putting them on both sides of Sky’s head and herself at the redhead’s mouth once she pulled down her tight pants.

A cry of pure pleasure came less than a minute later. Then deep breaths.

Bianca gathered herself with her hand still gripping Sky’s hair. She heard Copper panting in the distance, and Sky breathing hard underneath her.

“Excellent work, maid.” Bianca said the words casually and without ceremony. “Once you’ve unstrapped Copper from the bench, she can pleasure you as well. But nothing for her. You heard the things she was trying to say. Copper, you can report to my bedroom after dinner. I’ll have decided on a suitable punishment for you by then.”

Bianca stood. She retrieved a towel for herself and picked up her glasses before heading to the front door, all without sparing another glance at her pets behind her.

She nearly ran into Chestnut when she stepped out. The brunette girl was wearing pink and black exercise gear of her own. She jumped at the sight of Bianca, stepping back with a bow and profusely apologizing for nearly running into her.

Bianca chuckled, waved it off, and told Chestnut to have a good workout before going on her way.

Later, and not for the first time, Bianca considered how she might add new ways of incorporating her pets into her workout routine.