She is angry with family for not coming to help. She is in a nursing home and is being tested for a urinary tract infection again. But in the meantime, do we keep reminding her that her husband died years ago which seems to make her angry, or do we go with her reality and comfort her...but then we can't follow up by having a funeral (because he died 25 years ago) so what is the best way to respond to give her some peace.
However, if her dementia is this advanced, nothing you tell her is really going to make sense to her and you'll have to keep reminding her over and over. I don't think there's one explanation that will satisfy her enough to where she doesn't bring it up again.
This is a tough situation and I'm sorry you have to go through this. I'm sorry your MIL has to go through it as well.
It's unlikely she will move to the step of demanding a funeral. If so, I would keep saying the plans were in progress. I'd just keep making assurances she now had all of the family's support.
She may suddenly move to a new matter. Then, I would not mention it again unless she revisits it.