She’ll make stuff up like “ I used to work there” and she never did, or “ we’ve been here quite a few times “ and it’s a new establishment.
Or she says she’s seen that same man walking here every day, and it’s always a different person. And she acts like she knows about everything I tell her.
It is best to just go along with the story as that will be less stress on you and you won't be upsetting Mom.
https://www.agingcare.com/articles/how-to-handle-alzheimers-disease-lying-144204.htm
I think that even when their brains are completely consumed by the disease, there is still one little brain cell that tells them they need to function in society and they absolute and positively believe what they are saying is true. In my mom’s case, she would look right into my eyes as she told me stories about how she was a famous actress on the New York Stage. I agreed and even asked her if she ever met my favorite actress, the late Lauren Bacall. She said of course she had and what a wonderful person and beautiful lady Ms. Bacall was. She was happy and at peace telling these stories. And since she passed in 2016, I still have peace knowing I didn’t argue with her and deny what she was telling me was true.
"Confabulation is a memory error defined as the production of fabricated, distorted, or misinterpreted memories about oneself or the world, without the conscious intention to deceive."
Back then (80s), pretty much nooooooobody spoke of these behaviors, so it was truly out-freaking!
The good folks at her board-&-care assured us that this was fairly typical.
Her world made her happy. She said nothing to harm anyone's reputation or threaten their freedom, and we (slowly) learned to "visit" her there.
Mom is starting to make up stories s well but often her stories are paranoid in nature. The worst is that my Dad and my sister are planning to run away and shack up together. Too creepy! When she gets into paranoid talk I try to redirect her thinking to a more positive subject or I'll ask her if she wants me to get her some coffee. By the time I get back the subject is usually forgotten. Dad is easier than Mom.