thanks for your opinion, answering to your questions
no i dont have a relationship with the ex girlfriend, the only time i have ever spoken to her was a hello at my partners bday a few months back, where i heard her *****ing to a group of her friends about how i have "trapped" my DP for life with a baby.
so i dont understand why she would want to come "celebrate" in my opinion i think she thinks if she stays close to my partners mother she can stay close to her ex boyfriend.
my partner is aware how i feel about his ex girlfriend, but its a "girls" day so he wont be there. only thing im thinking is the day we get married my MIL will be orginizing my DP ex girlfriend to be my bridesmaid.