One year before I met my wife I had sex several times with my niece. She's only 7 years younger than I and my oldest sister is her mother. Things between us never been solved, even after I started dating my wife. My niece is always teasing and saying she wants it again. I've tried to avoid her but a few weeks ago my wife invited her to stay with us until she finds a place for her. I wasn't expecting this. My wife is a nurse at an hospital and works by shifts and this happens when she's working on the night shift...