Hello ! Lots of good suggestions already posted and I’m sure you’ll find a little respite ..it certainly is a challenge with repeated questions. Also what works one day, falls down the next, so having a tool kit full of tips certainly helps me. Good to read the above ideas etc.
Here’s a few we use
1/ sounds brutal but ignoring the question can work, if it’s repeated or your ignorance challenged, I say ‘oh sorry, I was listening to the news on the TV, then the distraction tactic kicks in. There’s a terrible storm in the USA, there’s a bad accident in the motorway, the actor ‘x’ passed away, you can fill the next half hour or so with more detail on the storm, crash etc..etc..Or I say I was on the phone to my friend (one he won’t know) and tell him why she had rung, she was telling me about her holiday, her new pet, the new shop she visited, anything you can imagine really.
2/ answer with ‘I don’t know sorry’ obviously not a reply for the question about you being her son, but can be used about the house, say ‘don’t know, sorry but we can ask Uncle Bill when he comes, see if he knows’ again distraction about another family member moves the subject away. If that’s an issue about her memory of a family member, use a neighbours name. You really have to be very creative, sounds harsh but sadly as we all know a PWD won’t remember what you said.
3/ try family photos, my FIL can spend a good two hours studying one photo, if he can’t remember a family member I show a photo with that person in. I explain the occasion, the rough date, location and who is who. There are always more questions but it’s a change of subject that’s brings me relief.
4/ walk away, saying ‘oh sorry, just a moment, I have to put the washing out, go to the loo, make the beds, answer the phone..etc...etc.. when you return she may have forgotten what her question was.
Good luck, stay positive !