I have 2 DC from a previous relationship, and a DC with my current partner. He also has a DC from a previous relationship.
My eldest DC call their grandmothers Nana and Grandma. My partner’s DC calls both their grandmothers Nanny (obviously this includes MIL). When I was pregnant, I said I didn’t want the baby to call MIL Nanny. Her other grandchildren call her Grandma, and I’d have liked our DC to do the same. I find the term Nanny a bit too cutesy. I know lots of people love it, it’s just not for me!
My partner has completely ignored my wishes and insists that MIL is Nanny. Our DC is starting to talk and I’m dreading when they’ll start calling MIL Nanny because that’s what my partner has taught them. AIBU?