Mom is 83 years old. In March, I had to move her into an RV across from me because her dementia was getting worse. When she’s around other people, she seems to carry on a decent conversation with others, but when she’s around me, it’s like she regresses into her dementia state. Is this possible? I don’t know if it’s that or is she playing me.
And yes, dementia comes and goes...........sometimes it's worse than others. My mother will have days where she's quite lucid in general, and others when she can't remember if she even went outside for fresh air 10 minutes earlier. And she's had dementia since at least 2016, in the moderate phase nowadays.
For what it's worth, my mother also plays me like a violin. That ability also comes from muscle memory, as far as I'm concerned, so the manipulation factor comes SO naturally and easily to her, that she can lie like a rug with no problem. Makes for a real picnic, doesn't it? :(
Wishing you good luck with a dreadful affliction.
As to dementia having good days and bad days, yes. Especially in earlier stages. All dementias differ also. For instance Alzheimer's has a steady decline without a lot of upside shifts. Whereas Lewy's dementia in earlier years can be up, down, all over the map on any given day.
As others have said, showtiming is common among all dementias that I know of, so it could also be that your mother is a good showtimer.
My FIL has Frontotemporal Lobar Degeneration with Behavioral Disturbances, and he should be giving a Ted Talk on how to showtime.
Judging from your profile, your caregiving has negatively affected your marriage, and your health. Your commitment is to your family and yourself. It's time to find mom a new "home".