I'm not too sure how long this has been going on up till now I always just dismissed it as her living alone and not having anyone to talk to most of the time. But whenever she has a conversation with someone she repeats the same story over and over she is getting older and I'm starting to get worried about her
To learn more about dementia/Alzheimer's, click on this link and scroll down to the various articles. https://www.agingcare.com/Alzheimers-Dementia
Guessing in the dark, I would say that if you have concerns about this person, take them to a doctor.