I love to fuck my Sister

It all started 5 years ago, I was home from overseas for a new job, and Karen had lost her job. Due to the company closing down, Karen had a loan and needed money for the next payment. I'm Patrick now 31 and doing quite well in my career. But a failure with women, I lent Karen the money for her loan repayment. But I looked into her loan and found it to have an excessive interest rate and other charges. I told her I would pay it out for her and she could pay me back no interest. She agreed, I started at a new job closer to home and found my own place. Karen got a new job, but it didn't last as it was seasonal. I got Karen to do my housework and laundry for me, but the loan stayed unrepaid. I wasn't worried about the money. But Karen was and it was her who suggested sex as a way to repay it. Karen was a virgin and wanted to stay that way until she married. So she offered hand and blow jobs. After I agreed to that she came over on a Saturday afternoon and we both got naked and had a great time together. Over time I got more interested in fucking her, I would ask her to let me fuck her. But she said no, I accepted that and we did the now normal sex acts. Then she agreed to anal intercourse on the condition I took her away with me on my holiday. I agreed and we took it slowly and it became a regular sex act for us. Then we went away on my holiday staying in the same room and started having more sex. I told her her debt was repaid and expected that the sex would end. But she still came over on the weekends and we had sex. Both of us enjoyed it and it became a regular thing between us. A year later our parents moved interstate, as our father got a promotion and Karen stayed behind and moved in with me. Sleeping in my bed and she let me take her virginity. A year later I got her pregnant and we have a son and another on the way.