Dad has been dead for 15 years, but recently Mom thinks he is still alive. Advice?

Is she still in AL as your profile says? With dementia and parkinson's, seems like that must be getting tough for AL to handle.

But to your question - just have some vague responses ready and change the subject. She wont' be able to understand or remember that he's gone, so I would not put her through the loss over and over again.

I’m going through that now for my grandparents, 2 uncles and my brother,.. all passed. It’s extremely tiring and just skips from one person to another. She is fixated on it and it’s frustrating. I was just asking for help regarding this. The only thing I have noticed is that if I’m keeping Mum busy, interacting with her, going places she doesn’t do it apart from occasional comments. It’s when I’m working (from home) and she’s left to her own that things go south. Sad part is, that is 5 days a week and I can’t afford to be spending all my time with her keeping her busy as I need to make a living. Hence why I was also asking for advice :) once she’s fully immersed on that track, she can spend the whole day harbouring those thoughts. I’ve tried all sorts of things and sadly the only thing that works is keeping her occupied/busy.

That is common with dementia. My mom thought her parents were alive and looking for her. Grandpa died.in 1964, grandma 2001 at the age of 101.

You will not be able to reason with her or explain they have passed. You need to learn to go along with her delusions. Trying to correct her will only frustrate the two of you.

They are on vacation, at a movie, went to friend's house, anythin, then they will be back tomorrow. We will check with them then.