I've been with my fiancee for 6 years and he has a 23-year-old daughter who lives in our guest house and pays rent and is studying at UCLA. She is very smart and outgoing but for some reason refuses to engage with me and seems to act as though I don't exist. My fiancee  is the sole provider of our household and we were using our guesthouse as a second income by renting it out to a friend of ours until he moved out and my husband decided that his daughter who was 18 at the time could live there and pay half the amount we had rented it at.