I find I actually feel quite a bit of sympathy for all the people I know who are struggling with re-gendering me after all this time.
It actually takes a bit of a toll on me these days, because I see people at the office in particular trying, trying, trying to remember. And I see the frustration on their faces as they slip & endure gentle redirection.
Some times I want to just let it go, but it would not just be counter-productive. It wouldn't honor the effort they've all been putting in for over 3 months now of full time RLE.
After my best friend died a month ago, I simply couldn't handle it and said "Everybody gets a free pass this week" when they blundered, because it was just too much to deal with.
My mom's Alzheimer's is advancing at such a pace that I have simply abandoned the effort entirely with her, but that's a special situation. If you can't throw a bone to your parent in such a situation, you might want to reconsider.
Cher, of course, doesn't suffer from dementia. She's just a mom struggling to grasp something bigger than she can yet digest properly.