Lisa

Lisa turned to Diana.

"All right," she said, "my turn. I need to punish you, right? In a way that's humiliating and degrading. Honestly, I'd feel guilty about it if I wasn't sure a part of you liked it."

She stepped forward then, as Stacy watched. The two twins were face to face, naked but for their collars. Suddenly, Lisa moved. Stepping closer to Diana, so that their bodies were almost touching.

"Here's the thing," Lisa said softly. "We're twins, right? Not quite identical, but close enough for a lot of people. You just know that there are people who would get off to the idea of us playing together. Can you imagine what it would be like to be broken to that?"

"I don't know what you mean," Diana said stiffly, but Lisa only grinned.

"Sure you do," She said. "We've talked about it a few times. You know the two of us have never had problems being sexual around each other. We'v even thought about having boys back and giving them a show. Back before this whole **** thing, anyway. Imagine though that we were both enslaved before. Not to the college, but to someone else. A collector. He or she wants the two of us to perform for them, a set of twins ready and eager to do as they're told, no matter how lewd the order."

As she spoke, Lisa circled around Diana, when she was behind the other woman, she struck. She grabbed her arms and pulled them, twisting them behind her back, she whispered into her twin's ear.

"It would feel like this, being captured and kept as a pet. We wouldn't want to do it at first. You know that. But they'd have ways of making us. They'd start slowly. Put one of us on a wooden horse, our legs spread, a narrow metal bench pressing into our pussy. We'd struggle and cry out, but we wouldn't be able to help ourselves."

Lisa moved to stroke Diana's chest now, her fingers teasing the pink skin of her areola and nipples. She shivered, Stacy could only watch amazed as she saw a whole new side of her friend.

"The only way for the one on the wooden horse to get some relief would be for her sister to cum," Lisa whispered. "Not only that, but it would have to be in front of her, with her legs spread wide. They want to make us used to cumming in front of each other. Of course, we'd resist at first. It would be so humiliating, shameful. But as the time goes on, the one on the wooden horse would get more and more uncomfortable, feeling it digging into our pussy, and after a while, we'd realise that there really is no escape but for the free one to climax."

Now Lisa's free hand had moved between Diana's legs, rubbing her pussy with a back and forth motion. The feeling must have been strong because Diana's face had gone pale. She bit her lips to avoid moaning, but it was clear that she was trying hard.

"Let's say that I was the one on the horse, and you're the one who has to cum. The rules are that you can't use toys, and you can't look away. You have to cum to the sight of me with my legs spread. To my gasps and moans. I don't want you to do it, it's humiliating, degrading, but we both have ****. You pleasure yourself to the sight of me, and when you cum, I'm finally let down."

Lisa's hand was moving faster and faster now, her body was pressed into Diana's back, her breasts squashed against her sister's skin.

"That night as we sleep, we're locked together so tight it's like we're embracing. Your body is pressed into mine, and we share a dildo. It's set to vibrate at the smallest motion, so any time either of us moves it starts. We try so hard to stay still, but it's impossible, and we cum together again and again. Each time we do, we become more sensitive, and it's easier for it to get us off the next."

Diana was wet now, Stacy could see the glinting arousal between her legs. She turned, but Lisa pushed her to the ground. Diana stumbled into a sitting position, her twin spread her legs, exposing her pussy to the world. Diana shivered as Lisa ran one finger up and down her entrance, teasing her folds and her womanhood.

"The next day, they have more games for us. They tease us and edge us, using all sorts of toys. We're shaking, shuddering on the floor by the end of it. They never let us cum, though. They **** us to endure until we want to scream. Until we want to beg. Our bodies are crying out for release, denied orgasms hammer into us one after the other. Until we're ****. They tell us that the only way we can get off is if we get each other off, but our hands are cuffed behind our backs. Do you know how we do it in the end? As our new owner laughs and takes photos? Uploads it all to the internet so our former friends can see?"

Lisa leaned over Diana's pussy, her short hair falling slightly as her breath tickled the other woman's pussy. Diana looked like she was frozen in place, unbelieving.

"We have to use our mouths," Lisa whispered and lowered her head.

"L-Lisa!" Diana gasped, Lisa's lips touching her pussy. Her tongue started to lap out, dancing along Diana's entrance. She threw her head back, a silent moan escaping from her lips. Her eyes went wide, and Lisa went to town. She sucked and licked and teased. She used her tongue and her lips, alternating between blowing, sucking and physical contact. Diana's back arched, and her skin went bright red. She writhed, moaning things that might have been words as bursts of pleasure traced her nervous system.

Lisa was good, she was very good. She brought pleasure with her touch, heightening and intensifying the feeling of Diana's mounting climax. Stacy could only watch, she felt like she had been frozen to the spot. She was watching one of her best friends eat out the other, and she was getting so turned on by it. She'd never been into girls before, not once. But it was impossible to ignore just how she felt now.

It was as if a whole new side of her was opening up for the first time.