Lisa

"I'll go first," Lisa said, trying to put on a brave face. "It's only fair. The two of you are in this situation because of me anyway."

"As you wish." The voice said, "The following path will show you to your equipment."

A path of light formed on the floor, Lisa could see the projectors on the ceiling, showing her a straight shot towards the centre of the room. There were various forms of exercise equipment scattered throughout, but it seemed that none of them had been chosen for her particular torment. Eventually, the path of light terminated near the side of the room. Lisa followed it, her sister and her friend at her side. As she went, she examined the other pieces of equipment that filled the area. It was obvious instantly that this wasn't a normal gym. Everything in it was meant to **** or humiliate. She could see that over to the left, the weight lifting equipment had been modified in such a way. The bench had been equipped with leather straps that could be closed around someone's legs or waist, and the weights themselves had little ribbons ending in metal clamps that could close around your nipple. Lisa could almost imagine the feeling of it biting down on her sensitive breast, the rope growing more and more taut as she lifted the weight. Teasing her own chest with each motion while others watched.

Elsewhere, there was a treadmill which was set up so that when you lagged behind a certain speed, it would punish you. Option one was a set of whips which would be engaged if you slowed down too far, while the second option was a blunt looking tube-like device which would be pressed against your body and discharge an electrical shock. Lisa tried not to look at it too closely, but the silence between the girls was now tense and anxious. It was clear that not a single device here had been left without some kind of modification. Before the day was done, they would all have their turn in them.

The path of light terminated on a machine that was smaller than the others. It was a smooth cylinder of metal about knee height. As she approached, Lisa saw that there was a plastic dildo connected to the top of the cylinder. She felt a flush of heat moving through her body. There seemed to be little mistake about what was expected of her here.

"This is an easy task," Said the voice again as the girls approached. "Squats but with a little extra. Lisa, wasn't it?"

"Yes," Lisa said. "T-that's my name."

"You're going first. All you have to do is to is squat over this machine and fuck yourself with the dildo as you do. There are some rules, of course. Just to make sure that it is a proper exercise routine. The dildo has to be completely inside of you during each squat. Once you start, you're not allowed to stop. If you do, or slow down too much, then you or one of your friends will be punished."

"That's insane," Stacy said. "Look at the size of that thing. I mean, it's not massive, but it's still pretty big! You expect her to get that inside of her easily?"

"It's the life of a ****," Diana said. "That's what's expected of Lisa now. To be able to do things like this."

Lisa nodded mutely, not trusting herself to speak. She approached the machine. The dildo was reasonably sized, and position so that she could splay her legs and press down into it as she squatted. But she could already see that it was not small enough to be able to do so casually. She would need some kind of lube, or, well, to be wet. Even as she looked, Lisa could tell that she would find no such item left conveniently for her. It was obviously expected for the slaves to make their own lube.

"Well..." She said slowly. "I guess I did kind of ask for it by going first." She gave a chuckle, though it was kind of weak. "I suppose I probably should ask the two of you to turn away but there really isn't much point, huh? I'm a **** now, things like this are just common occurrences."

She closed her eyes, swallowing in her throat. The tip of the dildo pressed gently against her lower body, prodding her sex as she positioned herself over it. it was dark, but she knew the other two were watching her. Anticipation pounded through her. This was the sort of thing she'd hoped for when she'd made those rules, but now she was doing it, it felt much more personal. Her hand shook a little as it moved up to her chest, cupping her left breast and stroking it slowly. The feeling made her skin tingle, her other hand started to stroke her pussy. She was feeling herself up right in front of Diana and Stacy, but she told herself that she didn't really have much choice. Lisa bit down, determined not to make any sound, but she could feel the heat raising through her body. Hot dampness seemed to spread between her legs, her womanhood starting to respond to the touch of her fingers. Breath caught in the back of her throat. Her fingers massaged her nipples, tracing her areola and chest.

By now, she thought she was probably wet enough. The urge to delay the moment was strong, but the idea of the other two just sitting here watching her get off wasn't very attractive either. She took a deep breath and reached down, her fingers spreading the lower lips of her pussy. The tip of the dildo was hard and cold as she pressed herself into it. Her hips shook, and her clit buzzed with anticipation. A low moan escaped the back of her throat, and she started to move up and down. Her motions were jerky at first, uncoordinated. This whole thing was alien and humiliating. She could feel her hips grinding against the dildo as she rose and feel, the pressure inside of her growing tighter and tighter. Heat filled her body, her hands moved to her chest, teasing her nipples and breasts with each rise and fall.

Lisa **** her eyes open, seeing the world around her. The dildo was hard between her legs, each movement impaled her lower body on it, spreading her womanhood further. The dampness from her pussy was already clinging to it. her calves and thighs burned from the strange positioning. She couldn't help but gasp with each movement, a tingling feeling like electricity coursed through her body. Both of the others were watching her. Diana's eyes were distant, a strange half smile barely visible on her face. She was the one who knew all of this was a game, that Lisa could stop at any point she wanted. She was enjoying Lisa's humiliation because she knew that Lisa too was enjoying it. Her pale white face was just barely tinged with red. Her arms were down at her side, a slight hunger in her eyes.

Stacy on the other hand looked mortified. Her eyes were wide, as if she could not tear herself away. her legs were clenched together, and her arms locked under her chest, the action pushed her breasts forwards, though she didn't seem to know that.

Lisa's pussy clung to the dildo, the feeling of it inside of her made her legs go weak. The motion of it, the penetration made her shiver. She gasped and gulped, both hating and loving the fact that she was being turned on by this whole thing. Humiliation and embarrassment filled her with mortification and shame.

After what seemed like an eternity, the voice finally announced that she had completed her task. Lisa sighed, trying to ignore how wet and sticky she felt as she pulled herself off the dildo. Her legs were shaking, and she was trying to ignore how aroused she felt.