My son has always called his grandma (my mother-in-law) the Italian word for grandma, "nonna" and his grandpa "nonno", the Italian word for grandpa. Recently my son called his grandpa "nonno" in front of his new wife and she then told him to start calling him just Grandpa Steve instead of "nonno".
I asked why and she said because it sounds like my father-in-law and mother-in-law are still married and that's not fair to her. I just looked at my father-in-law and he didn't say anything. My husband wasn't present when this conversation happened but he wasn't happy. He said there's no way she (step-grandma) is going to change the way my son calls my father-in-law.
What should I do? Am I overreacting or am I right for also feeling like she has no say so in what my child calls his grandpa?