How to ask an unemployed relative to move out?

My aunt lost her job 3 years ago, instead of looking for a new job, she let her unemployment run out and all of her savings and sold her house. She moved in with me in February of this year in exchange for daycare for my 6 year old son. The first month was ok, then she started getting very territorial, taking over the living room and kitchen. She is a hoarder and refused to get rid of anything when she moved and demanded that I move her into a bigger home. So I moved her into a bigger home last week and I am not allowed to decorate it or arrange it. Every time I unpack something, she gets mad and demands that I sell all my things at a yard sale. I bought my son a gaming system that he and I play together and she told me it wasn't allowed in the living room. My son and I stay in my bedroom all day because if we leave it she will make snide comments. I feel like a prisoner in my home, I have lost 20 lbs since she moved in because won't let me eat anything out of the kitchen. I want her to leave, how can I get her out of here? The rest of my family makes me feel guilty about not taking care of her but I don't think I can do it anymore.