What can I do to remove a family member who is not on the lease?

One day, I decide to help my mother who needed the help and moved her in without a lease agreement for her. Everything went south and now I'm trying to remove her but she will not go. She is everything running and decided all of a sudden not give anything to help out. We had caught her red handed stealing valuables from us and our son. I'm just afraid if I contact the lease office and tell them the truth that we also will get evicted. We have nowhere to go with no money.