And my sister knew exactly what was going on. She loved the attention it brought her. She loved teasing me by wearing some creamed panties and bending over for me. Her doing so made me desperately horny. I wanted her, I needed her.
I was undressing her with my eyes all the time. I accidentally bumped into her whenever I could. I showed off my bulge when she was around. She always smiled at me when I did. My fucking hot sister. My dream girl.
As mentioned before, my sister loved the attention. She loved my obsession. She used my obsession with her for her advantage: Slowly but steadily she turned me into her personal slave. At first she asked me to do stuff for her, like buying her some junk food, or getting her some ice cold coke from the fridge. I was glad to serve her. Because she always rewarded me with spreading her legs without wearing panties or with a quick view on her exposed tits. I always went back to my room after I got my reward. To beat down my boner. Thinking about nothing but my sister while doing so.
Her tasks for me got more demanding, more time consuming: She asked me to go shopping with her, to carry her bags, to judge her new clothes, to take pictures of her for her social media, to clean up her room, to take over her household chores — our parents tasked their kids with it, as sort of a supplement for rent — and to give her foot massages. The last task was my favorite one. Being able to be close to her, to take a look up beneath her legs, always made me hard. She tolerated my doing. She rarely ever called me out for peeping beneath her legs. She even sometimes called me her good boy.
Our parents you might ask, they saw what was going on. But they just thought that sis and I had become best friends. They were not even suspecting what really was going on between their offspring.
To a certain degree, our parents weren’t wrong. Sis and I got closer. We began to share everything. We began to talk about everything. So I once even told her that I was a virgin. Well, as if she didn’t know that before. Me saying that, put a smile on her face. A fierce one. She cuddled me after I said that. Then she told me, that she would take care of that problem, if I keep on behaving, if I keep on serving her. And what a good slave I was. The best one. Always there for her, obeying every single one of her commands.
One day, we were sitting in my sister’s room, she on her chair, I on the floor next to her, she addressed me jerking off to her: “I know, I make you really hard. You love watching me. And you love jerking off to me, but it is not good for you. We have to stop that.”
As always, she has trained me well so far, I gave her right. So she went on: “I think we have to lock you up. It is the best for you. You stop wasting your time jerking off. You will have more energy. You will be more focused on my tasks and on me, without that hard distraction between your legs. It will turn you into a better man.”
I just said: “Yes, sister, I think you are right.”
Then we went online together, on her computer. Browsing online sex shops for a fitting chastity device. But we had to measure my dick first. So she ordered me to drop my pants and my underwear. My rock hard dick directly sprung into her face. She looked at him somewhat disgusted: “See you are hard again. We clearly have to do something against it.”
Then she sent me over into the kitchen. Not ordering, not allowing me to dress myself again. So I stayed bottom naked. Luckily our parents were out. So I didn’t get caught. I returned with a huge ice filled bucket. Sis ordered me to stick my hard dick into it. Until he got small and limb. Then she measured me. Her being that close to my dick, made me rock hard again. We had to repeat the progress a couple of time until we had some valid data. Then we ordered a few cages. The best fitting one would be the one I would have to wear.
A few days later, the cages arrived. But our parents were home, so another two days passed by until sis and I were home alone. Then it was time to lock me up. I was jerking off like a maniac the days before. Sis knew what I was doing, she commented on it: “Enjoy your freedom brother, it will be over soon.”
Then, the final day of my freedom came. Our parents were out, the ice bucked was ready, we were over in the bathroom. Sis made me shave my pubes. She said it is more hygienic that way. I did as I was told. Then we tried to get the first cage on. I was hard again. Time for the ice bucket. Second trial, fit. But the cage somehow wasn’t feeling right. So we tried the next one. After my dick and my balls spend some time in the ice bucket. Sis was very patient, but told me that she would be happy, when it all is over fast, because she wanted to do some other things. The fourth and last cage was the perfect fit. She turned around the key, and locked up I was. Now my dick belonged to her. She was in full control of me. The way it should be.
I was happy with the outcome. The cage was comfy, you couldn’t see it through my pants and sis was very pleased. She was really happy. A huge smile appeared on her face every time I ran into her. Her behavior towards me changed. From now on I was allowed to see her naked. To help her getting dressed and undressed. To hold a towel ready for her when she was in the shower. Sometimes she even allowed me to help her in that way when our parents were around. I enjoyed my new set of duties. I loved them. But it made me very, very horny too. And back then, I had no way to relieve myself. So I asked my sister to let me out.
But sis said no. She’d love to unlock me, but she couldn’t. It would destroy the progress I made. There is no way around, I had to stay locked up all the time — except some cleaning time every day. Hearing her say that was very frustrating for me, because my urges were taking control of me. But she trained me well, so I followed her order. And accepted her explanation. My sister always knows what’s best for me.
Two months later, I still was locked up. Without any relieve at all. I was at my sisters side nearly all the time. I became better in anticipating what she wanted. I became a far better slave. Other people, even our parents, already were joking that we were a couple, but sis always set them straight: I just was her loyal obedient slave. A good boy. Well, she didn’t told that to our parents. Her saying that always makes me blush.
My urges, they were still there. I had trouble falling asleep. I was exercising a lot to keep them under control, but it was demanding. I told my sister about it again, she told me, because I was behaving well, she will help me with my problem. She said tomorrow, when our parents are out visiting friends the whole day long.