BF's Dad

My BF and I, have been living at his parent's garage apartment, a little over a year. He cheated on me with his ex-gf, and moved with her to her parent's farm, two states away. He just left me! All my stuff was at his parent's and I had no place to go. I've never gotten on with his Mom, but I know his Dad(48), really likes me. Long story short, I've been having sex with the Dad, and he wants me to stay in the apartment. He says his son, was an idiot. That he left Prime Steak, for Balogna! lol. I took that as a compliment. I'm not working yet, but he says don't worry about it, that I'm paying him well....The Mom, is starting to suspect something I think, but she's never home when we fuck. She's at work. He keeps a check on her location with his phone. I'm actually really enjoying the sex, now. He does things no one else ever has and makes me come so much, I can hardly walk for a while afterwards. His sex skills are amazing! Part of me says, I should leave, but where? Plus, I have got to get a job. I don't even have a car. BF's Dad, loans me his any time I need it. I just don't know what to do!