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 la...

A loud slam of the front door announced to Mark that his little sister had arrived home from her friend's house. She skipped into the sitting room where he was watching TV and promptly snatched the remote out of his hand. "Hey, what was that for? I was wa...