Witzend
Both I and the other GM are Granny, with first name if needed. Could you not be e.g Nanny Ann and Nanny Sue?
It’s worked fine for us.
AIBU that as a new grandparents, who is refered to as Nanny by my kids and myself, my mother also wants to be called Nanny?
Well, I've read it three times and I'm still confused, sorry.
Yes, Nanny Sharr and Nanny Sue (or whatever your mother's name is). Although perhaps you should pick an alternative.
Anyway, she did have first dibs, being Nanny already!
I think.