She flexed her arms and ground her teeth to the gag that was distending her mouth and stomping her tongue down beneath it. Her body was starting to succumb to greater levels of distress from having languished in bondage now for some time. Her experience with such restraint told her that she was probably about an hour or two into her sentence.

The room in which she had been bound was a pristine white chamber like all the others in her master’s private wing. Dense steel rings were situated on the walls, and others dotted the ceiling. She was familiar with many of them, and they had stretched and suspended her body countless times and in numerous configurations.

A powerful spotlight in each corner poured cones of light down into the chamber to make the smooth surfaces glow. The rest of the huge building was a decaying hulk, supported by the fortune her owner had amassed. Quite why he spent so much money and effort keeping it going was beyond her, but she did not need to know why, she was here to serve and obey him.

A padded rectangle was bolted to the wall and surrounded by a number of dense straps. Once her back had been pushed to the cushion, these belts had reached out to hug her into the soft leather surface. They had embraced her chest, crossing in her cleavage to place a slight crimp to her breath from the power they exerted on her ribs. Another pair ran horizontally across her belly, and two more formed a crotch band that hauled into her inner thighs and pinned her hips against the wall. Her arms were stretched up above her head and entered thick leather shackles. These were clipped to a lofty wall ring and helped support her weight a little.

Her head was wedged between these racked limbs and a rubber hood had been pulled down over her features before the gag had been applied. She currently peeked out through two minor eyeslits, and the two apertures for her nostrils released a brief slender pipe that wobbled with even the most minor movement. Their meagre width forced her to laboriously haul for every breath, and they also dissuaded panic because of this hampered intake. The gag itself was a bloated rubber ball gag that was held in place with a belt that travelled around her head. The massive and slightly pliant ball filled her mouth to an acute degree and made it impossible to sneak breaths around it. The corners of her maw were already aching, but there were far graver pains occupying her thoughts at present.

Her legs had been stretched straight out into a lewd split before her ankles were captured in thick fetters. Riveted atop steel poles, the poles were two foot high and constructed of polished steel so that no matter how hard she dragged at the cuffs, she could not break free of these anchors. The tautness in her legs was a distinct bane, but the real ordeal came in the facet of the cords that had been fastened around her big toes and which stretched back before snagging a nipple clamp.

The diabolic pincers had taken a generous pinch of flesh and the string that hovered above her legs to connect toe and breast thrummed as she shuddered and fought to endure their companionship. With her feet bent back as far as they could go, her soles were constantly being rent by heinous cramps but any attempt to ease this misery only made the clamps drag at her poor captive teats. The tunnel that her nipple rings maintained seemed to swell and warp with every punishing throb that reverberated through the tips and seemed to pour through the rest of her breasts.

Her naked shaven loins were exposed and free, and the chastity belt she was required to wear was set to one side. This was an additional nightmare for her because it was bad enough to be denied access to her own pussy, but to have it freed and accessible if only she could slip her bonds was even more frustrating. If she could just get one hand free, she could cheerfully masturbate, but her owner had engineered her containment flawlessly. All she could do was suffer for his pleasure and await his decision to free her, whereupon she knew the chastity belt would immediately return and lock her pleasures away from her.

She looked out across the room and to the corner where her sister had been bound. Her friend was not a true blood relative, but their appearance was so similar that they had played the part in normal life. Their former selves were such a distant memory now that she could barely even recall her own name. Her master had called her nurse White, and her friend was now nurse Black. He had called them sisters, and that is what they had become.

When he had delivered them from a travesty of justice, one that was poised to see them spending the rest of their lives in prison, they had been grateful. However, once he had finished training them here, they adored him with utmost passion and a level of reverence that boarded on the fanatic.

The thought of him made nurse White surge against her bondage and curl her aching big toes down so that her nipples thundered with additional woe. Her mind boiled with notions of his cock within her, his whip upon her, his hands grasping and restraining with expert attention.

Nurse Black was in no position to accentuate her suffering because their master had applied a much more encompassing degree of restraint upon his property. Nurse White had been bound first, with her sister helping apply it, and this had left her to watch her friend’s capture as well as to savour the image of her master at work.