My mum struggled when she had to move down south to be near to me, it's taken a year, she's doing ok but wants me to go more often. I could do that, but am getting increasingly agoraphobic, and just don't WANT to go out! On the other hand, I am very socially isolated and depressed, but am now scared to do anything on my own. My life is basically online! My own fault, I know, but I don't know how to end the rot .... problem is, when you don't do anything, you don't have anything to talk about either, so any friends you did have, gradually drop off.
Regarding the shopping, why not do an online shop which would give you a little more time to devote to other things?
I wonder why she thinks she needs to 'clear the air' with you? Take the grandkids with you if possible maybe and kill 2 birds with one stone?
You probably need to have the talk so that you actually know what she wants/needs?