Wondering if anyone else have these symptoms of thinking pictures are real people?

My mom has dementia and I am now caring for her in my home. She thinks pictures of people are real and waves at them. Sometimes she talks to them. Magazines at the stores are a nightmare. She does this to billboard pictures, photographs, pictures of people in stores. I saw her looking at a magazine and I told her they were not real just pictures of paper. She said how come they move, wave and wink at me. She cut out a picture of a man in the magazine and carried it everywhere and talked all the time to him. She thinks tv people are real and they can see her and that she knows all of them and they know her. Its just so weird. We go to a store that has large pictures of people painted on the walls and she waves and talks to them and calls them her friends and wants to go and see them all the time. Needless to say I don't want to go there because of her waving. She thinks that people are stealing her clothes and counts her money in her wallet several times a day. Always saying those people keep taking my things. I just ignore her when she says this or say no people mom. My mom has just been started on Namenda and Im not sure if it will work or not. It started with my mom seeing people in trees. I would say mom no people in trees and she would say I have good eyes, whats wrong with your eyes. She makes me laugh sometimes. Any comments would be nice!