Got to love it when people bitch about you while living in your house rent free. I had one of those moments too. It like one of those episodes of The Simpsons where they let someone live in their house for a little bit(Like Abu, Otto or Mr. Burns) and it sucks. I wish I could un-live those days. Don't worry it will come to the point where you and your dad will probably have that should she stay or should she go discussions.