My friend thinks its funny to call my dp's children my step-children. I don't like it as they already have a mother and I don't try to parent them. I'm not married to their dad and even if I was I don't think I'd like it. I just don't like the term and think it implies that the biological mother isn't the main maternal figure in their life.
She's recently stepped this up a notch and written it on social media as a comment on a picture my oh put up. I am pretty sure he's friends with his ex on there so she could see this and feel uncomfortable. I got my boyfriend to delete it when I saw it but he doesn't think its a big deal but I feel like I should have a word with her. He thinks I should just leave it and I'm over-thinking it.
Would I be unreasonable to tell her in no uncertain terms to stop this or am I over-thinking this as dp says?