Calling him stepdad?

Miranda

I’m 25 years old and my mom met her fiancé 3 years ago. She is upset I don’t want to call him my stepdad, or introduce him as my stepdad when they marry. I just think it’s weird and would say “this is my mom and her husband Ron”

She thinks that’s so disrespectful and mean. Am I wrong? I just think that’s something a child does, somebody growing up with him. But I’m married and have my own house and I just think that’s odd.

He’s a great guy and they’re great together, I like him but I’m not comfortable saying that. Or this past Father’s Day, she’s offended I’m uncomfortable wishing him a Happy Father’s Day. Opinions? How can I go about explaining this to her? She’s not accepting of my answer.