Advice on handling this situation

[lioness88]

Since my DD was born a few months ago, my DM and stepdad have been referring to my stepdad as 'Grandad' and I haven't felt that comfortable with it. For a start I don't have a close relationship with him, my own dad is very much in my life. Stepdad is a difficult person, he can be quite selfish and I don't see him very often. He's only met DD twice.

I spoke to DM about it today after getting a Christmas card signed Nanna and Grandad and said how I don't know if I feel comfortable with it and she got really upset, said it would break his heart etc.. so I agreed to just let him be grandad, but I'm stewing over this several hours later, feeling guilty for upsetting my mum but also feeling annoyed that they didn't ask me first and now I have to call him grandad around DD.

Am I overreacting here?

Oh my op. My dad is dead and my mum is still on her own but if she met someone and wanted him to be called grandad I would really struggle

Your first mistake was backing down because your Mum was upset. I know why you would as I'm similar and don't like upsetting people. But your Mum isn't getting that this upsets you. Why would it break his heart if he has only met you DD twice? He is clearly not very involved in her life. This seems more about what your Mum wants. I think you need to call her back and say you were wrong to relent and really aren't comfortable with it and would prefer to just use his name.