my sister came to help with caregiver duties of our mom. my sister has been using pain pills and possibly other drugs, but i cant prove it. she was recently released from jail in las vegas for domestic abuse against her daughter. shes been with me and mom for 1 week and already claiming she is better and mom wants to live with her. When she had my Mom a few years ago she ignored her so my mom moved out and got her own place. I just want to know if my mom wont sign legal papers, how can i protect her and keep her in a stable and healthy environment like my home?