My mother lives in fear. She is convinced the "pest" is trying to get in her house, can see her wherever she is in the house, she hears his voice. No logic will convince her otherwise and she gets very angry is she thinks I don't believe her. She refuses to leave her home to go to a senior living facility. She thinks I'm trying to get her to leave her home. She's told her friends about this "person" and they are very worried. I don't tell her it's in her mind as this upsets her. What can I do?