HELP Mama Drama!?

I got divorced a couple of years ago and my mom use to live in the back after that drama she came to live with me and my new hubby. Man have things change,Might I add that she has always felt she has lack of love she and my dad sleep in separate rooms in my house ok. She is jealous of how loveable my husband is towards me. She bad mouths my husband after he paid for her surgery and after long hours of work he takes her to the doctor. She whinnes and complains.She doesn't let me lock my bedroom door and if she hears a noise in my room she sends my 3year old to the room. She always paces in the hallway or is standing outside my door. she is moody and if i leave with the kids and my husband she calls me a million times. In order for her to tak care of my kids for a weekend for me and him to have alone time I have to lie that i go out of town for job related reasons. I feel bad telling them to move out because my dad is really cool . Any Advice I am so tired of my mom! She is so nosy!