My Nerdy Brother

My older brother lived nearby me while I was attending university and as I was short of money most of the time. I would go to his apartment and use his computer to do my assignments. Then one Friday we had no afternoon lectures, and I had an assignment due early the next week and wanting to party on the weekend. I went to my brother's apartment, I had my own key and thought he would at his job working. But I was wrong he was home and in his bedroom with a hooker, he hadn't closed his bedroom door and I saw him and his hooker, they didn't see me. They were already finished and had just showered and were just starting to dress. I decided to keep out of sight and went into his spare bedroom. At first, I thought she must be his girlfriend and was surprised he had one. But as I peeked out of his spare bedroom, he paid her. She got more than I did in a month as an allowance, and she then left, and he left shortly afterwards. I fucked guys and got nothing except maybe return date. I started thinking I could sell myself and get paid for sex instead of giving it away. But I wasn't that game, meeting a stranger and letting him fuck was a step too far for me. I then started on my assignment and was still doing it when my brother returned home. He said hello and asked was I hungry and I nodded and as usual he had takeout delivered. I didn't say anything about seeing him with a hooker and the next day I returned to his place to finish my assignment, he wasn't home and returned shortly after I had gotten there. He had been shopping and I had a lunch with him and left after finishing the assignment. I canceled my plans that night and stayed at my dorm. Telling other I wasn't feeling well, I was okay but had no interest in possible sex with anyone that night. I had the vision of the money my brother had paid the hooker lodged in my brain. Anyway, I decided I could make money selling myself. But only to my brother, I know he would treat me okay and I was already taking precautions. In the morning (Sunday) I again went to my brother apartment, and he was home sitting reading a book and was a bit surprised to see me as I usually slept late after dating. I told him about seeing him with a hooker and he was totally shocked I knew and straight away asked me not to tell our parents. I promised not to tell and asked him about paying me for sex with him instead of a hooker. He was stunned silence and I had to asked him for his answer, by telling him I was always short of money, and I could provide him with sex. He said it wasn't right and I responded I take precaution and fuck boyfriends and fucking him wouldn't be much different. He said he would give extra money and I said no free money, I'll work for it. After back and forth we decided to think it over more before making a decision either way. He had to go away on business on Monday and would be back Wednesday afternoon. I again went to see him after lectures on Wednesday and I convinced him to give me a try just once no charge. I stayed the night and really drained his balls, and I didn't use a condom like the hooker had. I do with my boyfriends, but this time with my brother. We enjoyed the sex after an awkward start and fucked again in the morning. That evening I was back, and we made a deal. I would get the same as the hooker had gotten and would stay the whole night instead of fuck and go like the hooker. We settled into a sexual routine, and I found I preferred being fucked by my brother and not because he was paying me. After a month of regular sex between us I moved in with brother and into his bed. Two reasons were behind it, dorm fees were increased, and my parents couldn't afford the extra and it would come from allowance. So, I moved with my brother, and we had more sex. But no extra cost for him as I decided to call his payment my extra allowance. After finishing university, I got a job with firm who employed my brother. I'm still fucking him, and I don't date anymore, and I accompany him to any event he has to go too. He colleagues know I'm his sister and also know he doesn't date and think I'm just his companion at these events. None know I'm regularly fucking him. I still the allowance from him.