Yeah they do. I live in the same house with them. But, he comes and goes. Sometimes he's here for a full week, then he'll be gone the next.

Yes, I have tried talking to her about it. She recognizes how I feel and says she's grateful that I'm so protective of her. She always says that she's 'moving on' and then never does. She also rationalizes a lot of his bad behavior by saying that he got used to not being her priority (which was me), and so...I guess this means it's ok? She says that she did not want a full time relationship when I was younger, and he took the back burner, which is why he became accustomed to being 'in and out'. I don't think that's a good excuse for lying about when you're coming home, not coming home when you said you would, and all the other crazy stuff I mentioned.

She also mentions that he helped her a lot with giving me rides. To his credit, he did give me rides when I was younger, which I'm sure was very helpful to her. But again, a good does not cancel out an evil.