My Mother thinks that a man, woman, and child come to her house every night around 9:00pm. She says they have no face and they can just come and go thru the walls, They don't have to use the door. This has been going on now for 3-4 months. She says they use her phone, sometimes they leave their child with her, They sleep on her floor or in her car and leave early in the morning. She is not scared of them but doesn't want them there and they won't go away. She gets mad at me if I don't see them and I really don't know how to handle this. Her stories about them are so consistant and I am wondering if this is common and what I am supposed to say to her when she wants to talk to me about this all the time.