Brother Sister a Love story

I'm Jason 29 and have a sister Gemma 26, our parents divorced when I was 12. I was taken my by father and Gemma went wilt our mother. They didn't let us see it other after the divorce as it was a very bitter divorce. Both parents were well off due to divorce settlement and when my father passed away when I was 26. I was finally able to track down Gemma, but couldn't see her as my mother blocked me and she even refused to see me. Such was her hatred of my father still, but she wasn't well also. Always a heavy smoker, she had lung cancer and almost 2 years later she also passed away. I came to her funeral just for a chance to see Gemma. I was shocked by how small the funeral was, the undertakers and priest with 2 servants and Gemma plus me. Gemma hadn't recognized at first and asked who I was. Shocked that I was her brother Jason, but then happy to see me again. She told me our mother told her of the death of her father by saying the arsehole is dead. Anyway Gemma wanted to get know me and now our mother was gone there was no reason we couldn't get together. We bonded straight away and like we joined together we were always that close. Gemma hadn't had much to do with anyone outside of the house while our mother was alive. Living more like a nun than a daughter and home tutored. I took her to her first cinema since the divorce and we went everywhere together and finally to be together as well. Sex seemed right for us and not taking any precautions Gemma got pregnant, that scared us until tested showed no problems and so were living together as man and wife.