I had known for a long time that I was in love with my sister. I first realized it when I returned home from school one day, aged 14, in tears. I had told a friend that I liked her “more than a friend” and, predictably, it didn't go as I had planned. I lay on my bed that afternoon, head buried in pillows, refusing to talk to anyone. That was, until my sister came home from her school. She came into the room quietly and cl...