She still lives alone and is completely cognizant about everything else in her life. Can talk about current events, has good memory etc. In the evenings though, she says a "gang" is operating around her place. They put wires on the roof, take pictures of her through the windows and put white powder all over everything inside and outside her home. She gets mad if you try to use reason and logic to show her that there is nothing there. Absolutely believes these "gremlins" are there but mind seems fine otherwise. We are not sure what to do with her?