Nerdy Brother, Broke Sister

I won't bore you with the history of my sexual relationship with my sister. But I was attending university and doing well in my studies and financial activities as well. I was involved in several money-making ideas me, and some friends were profiting from. My sister not so good with her studies and would rather party rather than do anything else. All well and good till our parents had to cut back on paying allowances. Not a problem for me and I told my parents before I didn't need an allowance which they stopped. I also had my own place and thru our game programming and other financial activities was able to buy it outright. I was planning to sell it on completing my studies and buy something new once I started the job I was already promised. I could work from home and so no hurry to relocate till I found the perfect place for me. My sister because of the cutbacks was asked by my parents to consider living with me. Which wasn't greatly received, but with bigger cuts in her spending money to result decided moving in with nerdy brother was better than less spending money. My parents were having financial problems, which they would overcome in the following months. But until then money was tight, I offered to help. But it was politely declined, anyway my sister and me hardly saw each other at first. But more cuts followed before it was finally fixed, which meant less money for my sister. She caught me masturbating myself, when she needed money and had decided to ask me for a loan. At first, she made fun of me then realized she wanted to borrow money from me. But instead of asking for a loan she offered to fuck me instead, saying she needed money, and I could give my hand a rest. Caught with my pants off, horny and a willing girl offering me sex I accepted. She was amazed she said by how big my cock was about 9 or 10". Anyway, the first fuck was awkward at best, but I improved as time passed. My sister trained me to please her and started fucking me for her personal pleasure without payment. Her other lovers only interested in themselves she said, pleasing my sister also pleased me. I finished university and stayed in the same house with my sister living with me and regularly fucking me as well. Her boyfriend was dropped as she was over him, she said. When she finishes university, I'll probably sell and find somewhere new and maybe she will stay with me. Well, she trained me to please her and I'm doing just want she wants, no loans and no payments either.