My fiance, my daughter and his daughter moved into his house together after his daughters mother died. His daughter is narcissistic and has started a lot of drama in the house. first she has manipulated and taken advantage of her dad so much financially. He drained his savings to pay for her motherâ€™s funeral because of the life insurance policy lapse. Now after he has paid for if the life insurance check showed up for her as the beneficiary. She did not pay him back anything at all. She is so selfish and extremely mean to my daughter. My fiance refuses to say anything to her so I finally snapped. Now he is angry at me!! She is 23 and refuses to move out and hates us all and is very disrespectful. I am really losing my mind from all of this. Any advise how to deal with living with her and how to get through to my fianceâ€™?