You are NOT wrong! You are letting them live there for FREE and he can't even clean up after himself and his family? I'd kick him out on his butt too! I stay at my parents house frequently and would never not clean up after myself. In fact, every time my parents ask me to do something for them, I never say no! They have been so good to me. You have been good to them and they are taking advantage of you. I wouldn't feel guilty at all if I were you.