So this is my first time posting and am very unsure if I am overrecting or not.
Bit of background, my DP and I had a baby boy 5 months ago, my son is his second child. My DP's daughter is 5 years old and he has not been with her mother for the past 4 years, they have a relatively amicable relationship and the whole blended family thing seems to be working for us.
So, my MIL constantly calls me by my DP's first child's mothers name and I absolutely hate it. I understand that she is terrible with names and often calls people the wrong name but I hate being called the other woman's name. I don't want to make my MIL feel bad by having a go as she is a genuinely nice person and she feels embarrassed every time she does this but it is really starting to get to me. I'm not my DPs exes biggest fan and I think that is why it irritates me all the more but would I be unreasonable to tell my MIL how much I hate this one thing, especially when she is not being malicious just a bit... I don't know the word but definitely not trying to make me feel bad.
I guess I just hate the idea that I am interchangeable with his ex just because we are both the mothers of his children, I mean she never calls me my BILs girlfriends name.
Please don't flame me if I am being unreasonable I perfectly willing to accept that.
Oh and my DP has mentioned to his Mum how much he dislikes it as well but she just seems unable to break the habit.