Kate put on her ski mask and stepped out of the car. The house was in full view, some fifty yards away. It wasn't the fist time she did this, excitement growing within her, heart beating faster. She wasn't nervous, she was giddy, thinking about all she would steal this time. Besides the mask, she was wearing black cargo shorts, a black tight fitting long-sleeved t-shirt, some leather gloves and a backpack. Kate was very tall, but still that outfit made her blend into that new moon night, made her a part of her target's driveway.

It was just a precaution, of course. She knew that bitch Deborah wouldn't be home. That one would be out partying in those disgusting clubs she liked to dance in, only to arrive hung over at work. Kate had told her time and time again to slow down, to care about her performance, about the company. But she wouldn't listen, a loose cannon through and through. Kate was still wondering what to do with her. First I'll steal her valuables, and tomorrow I'll fire her. That'll take her down a peg. The excitement was growing. She had almost reached the back door.

Kate was actually very wealthy, she didn't need to steal, but she wanted to. That feeling of power, of taking whatever she wanted. Her employees feared and respected her, but that wasn't enough. She wanted to have control over their private lives, their property. Though she didn't only steal from the houses of people who worked for her, that would raise too many questions. On average, she did two or three homes a month, which brought a nice chunk of change and some keepsakes. But most of all, it brought that feeling. She was the boss, she was the elusive thief who couldn't be caught, she wasn't someone to be fucked with. What a rush!

She slowly and methodically lock-picked the back door, opened it and made her way inside. It lead to the kitchen. There were dirty plates in the sink, and two empty glasses. She already knew Deborah had a little sister, Cynthia, who had just turned eighteen. And she was bringing her along to party, to learn the family's vices early on. Disgusting. Kate walked into the living room, stepping very quietly just in case. The living room was fairly normal, with a couch, a coffee table and a big flat screen TV (which maybe could be carried back to the car). Behind the couch she saw the stairs, and begun slowly walking up them. Even though the were wooden, they didn't creak beneath Kate's shoes. Upstairs there was a hallway, with one door right in front and another one to either side. Left one was a bathroom, front one was one mess of a bedroom, full of dirty clothes, books, and a scrawny looking teddy bear. The door to the right was another bedroom, slightly more organized, with some posters of boy bands and kpop stars. All perfectly normal, except... There was someone on the bed.

It was a skinny looking girl with pink hair, definitely not Deborah. Kate had never seen her sister, even in photos, but she figured that it must be her. The girl was asleep, face down. Didn't feel like partying, huh? Well, it was an inconvenience, but she could be dealt with. That's why Kate carried restraints in her backpack. She rarely had to restrain anyone, but when she did it was quite fun. What a treat to see them struggling, helpless at her feet, wondering what she was going to do to them. She carefully, very slowly pulled back the blanket, leaving Cynthia exposed, in a grey top and red booty shorts. She was very short and slim. Kate took out a length of rope from her backpack. Then she grabbed one of the girl's arms, slowly coiling her fingers around the wrist, and put it behind her back. Then the other one. She wrapped the rope around the wrists and tied a knot, leaving enough slack to avoid cutting circulation.

Now Cynthia was lying face down on the mattress, hand tied behind her back. Kate pulled her legs a bit closer, and tied her ankles. When she was tugging at the knot, the girl awoke. "What the fuck?", she shouted, "Debbie? Are you..."

"Shut the fuck up", Kate had been quick, and muffled the girl with one hand while she rummaged in her backpack with the other. Cynthia tried to scram, but the hand was clasping her mouth tight. Finally, Kate pulled out her favorite toy: a ring gag, which left the victim with their mouth open, leaving them a bumbling and drooling mess. It was the kind of humiliation that she enjoyed inflicting on others. It was a true show of dominance. When she fit that plastic ring in the girl's mouth and strapped it behind her back, it was the best feeling in the world.

"Now, you keep quiet while I look for valuables", Kate said, and the girl glared at her, huffing and puffing to show her anger, "Don't look at me like that, young lady. I'll have to show you some manners if you don't calm down. Just accept your situation, you are powerless."

Cynthia started rolling around on the bed. And Kate just laughed. Then she got close to the bed and spanked the girl's ass as hard as she could, and then once more, so hard that she felt the itching on her hand. Feeling that she would settle down, at least for now, Kate got out of the room. The next two hours were extremely productive: she took a box full of jewelry, some cash, a cell phone, two ipads and a laptop. Then, she sat on the couch and put on some TV. She watched some news and part of one of those weird late night documentaries. The day before, she had pulled an all nighter fixing some work stuff Deborah had failed to do properly, so soon she fell asleep.

The loud music of a commercial woke her up about half an hour later. For a minute Kate was disoriented, but soon she other thoughts in order. She was a professional, after all. I guess I'll have to take the gag off that little bitch and put a proper one. She climbed the flight of stairs, this time not caring about the noise. In fact she stomped on the stairs to make Cynthia squirm in fear. She opened the bedroom door.

"How are we holding up here?", she entered the room, and just as she noticed it was empty, a large piece of cloth fell on her and blocked her vision. It looked like a white blanket. Kate tried to slap it away, a pair of invisible arms closed around her waist. Her own arms were still free and struggling, but now the cloth now was being held against her torso. Cynthia kicked the back of her leg, and the thief fell to the floor. Cynthia sat on top of her, grabbed a hold of Kate's ankles while she still struggled against the blanket. She tied them together and tightened the knot as hard as she could. Then she got up, pulling off the blanket.

"Get off me, you fucking whore!", Kate managed to get on her tied up feet, arms spread out to keep her balance, "You fucked up now."

"Shut up, idiot", Cynthia pushed her onto the bed, and then climbed on top of her. They wrestled for a bit, but Kate was beginning to panic and couldn't really keep up. She ended up face down, her arm being painfully twisted behind her. "Do you give up?"

"Leave me alone!", she couldn't accept it, no. She always came out on top, she was the boss, she was...

"Give up!", Cynthia gave her arm a good twist.

"Alright, alright", the pain had become unbearable.

"Alright what?"

"I give up. Please, stop. I give up!"

Before she knew, her wrists were tied up tight. She was made to turn around, face up. The girl was sitting on her stomach, making her completely immobilized.

"Well, let's see who we got here", she pulled off Kate's ski mask, "No way! Are you Debbie's boss?"

"It was just a prank, I swear."

"Yeah, a prank. You think I'm dumb?"

"Please, don't tell anybody", her pride was gone, the only thing that mattered now was avoiding jail, "I beg you, don't call the cops."

"Don't look at me like that", Cynthia said, "I'll have to show you some manners if you don't calm down. Just accept your situation, you are powerless."

"Please, please", Kate broke down crying, "I'll do anything you want, please. I beg you, don't send me to jail."

"Look at this coward. Can't even face the consequences of your actions. You though you were hot shit, huh? Well, look at you now. You are pathetic."

"I am. I am pathetic. But please..."

"You really think I won't call the cops on you? You deserve jail time."

"No, please. I'll do anything you want. I'll be your slave if that's what."

"Look at you", Cynthia burst out laughing, "You need to shut up."

"I...", Kate saw the object dangling from her captor's hand: her ring gag. Before she could protest, Cynthia had already locked it into her mouth with suspicious agility. She had never experienced the gag herself. Her mouth was forced open, and she could not make more that stupid sounding grunts and moans.

"Much better. If what my sis tells me is true, I'm doing humanity a favor by shutting you up. Now, if you want even a slightest chance at avoiding jail, you'll be the most obedient and submissive girl in existence. Got it?"

Kate nodded. Cynthia, still seated on top of her, reached her arm behind her, and somehow came up with a big and wobbly pink dildo. Kate blushed, seeing the humiliation that awaited her. It stung badly, but she needed to get through it to keep her freedom. The tip of the dildo was put inside her mouth. It tasted awful.

"That's it, open wide. Oh, and you'll have to forgive the taste, I haven't cleaned it since my last session. You don't mind, right?"

She got the dildo into her mouth. Kate did her best not to gag from the taste and from the length the damn thing had. She begun moving her head up and down, to show she was complying. Cynthia got more excited when she saw that, and pushed the dildo into her throat. Kate's face got red, but she was forced to keep deepthroating. She closed her eyes, focusing on not throwing up. Seconds slogged like they were hours. It was disgusting, it was embarrassing, but she couldn't struggle. She heard the girl moaning, and opened her eyes to see her with a hand inside her shorts, stroking. Please, let this end. And soon enough it did.

"You are a natural", Cynthia said, "Oh, by the way, I set up a camera. You'll do anything my sister asks or everyone will see this. You may be the boss, but you will obey and submit to her. Understood?"

Kate nodded. She had no other choice. Cynthia spat on her open mouth, and she grimaced, but swallowed it when ordered to do so. Then her pants and underwear were pulled down, and she found herself face down again.

"Since you are behaving yourself, I'll use some lube."

Droll fell on the mattress beneath her chin. She felt cold fingers pulling her asscheeks open. Something wet was smeared across her ass. Finally, Cinthia rubbed the tip of the dildo all over it, teasing. Kate did her best to relax, especially those muscles. The dildo begun working its way inside her. It was wide and uncomfortable, but slowly it got inside. Then it pulled out, then back in again. The slow rhythm picked up speed little by little. Her ass as making wet sounds, and Cynthia was laughing again. Kate moaned, half to release tension and half to appease her kidnapper. She got fucked for almost ten minutes, and the speed sent shockwaves of pleasure mixed with intense pain all over her body. She was glad when it was over. And even more so when Cynthia turned her around again and took off her gag.

"You are doing good", Cyntia said, "You are learning some humility at last."

"I am sorry for everything I've done.", Kate herself didn't know if the apology was genuine, "But please, let me go home. I won't bother you again. Or your sister."

"I won't call the cops."

"Oh my god, thank you so much."

"But you're not going home just yet."

"Alright", she felt it was best to put up with anything and not complain.

"Look, I'm not sure if you know already but my sister is a lesbian. I'm bi, but she absolutely adores sleeping with girls. When she comes back from partying, I'll let her know the situation. You will be her slave, obeying every command. It won't be easy, especially if you are as straight as you look, but you will submit. She'll probably want to use her collection of dildos, nipple clamps and other toys on you, maybe bring a few friends over. If she feels generous, maybe I'll get a turn playing with you. Anyway, you won't complain. And if you're good, maybe in a couple weeks you'll be free. Got it?"

"Got it", Kate said, almost thankful, "I submit, I'll be a good girl."

And that's the story of how, in Kate's little world, that bitch Deborah became Mistress Deborah.