Hi I am 25 years old and my boyfriend of 3 years is 38. We have a 2 year old daughter together and a baby on the way. He has a 16 year old daughter from a previous marriage and she makes my life a living hell. The first couples months were ok then everything started to change. She would knock on our door in the middle of the night to tell us she was in her underwear. This went on for Several nights and finally after telling my boyfriend about it he told her and she...