So, I'm organising a birthday party for my daughter's birthday with my ex. My new girlfriend has just been introduced to my ex and that circle of friends, which is great, but she wants to invite her dad to the party as well. My ex hasn't met him yet although my children all have and like him.
I personally think it might not be quite the right occasion to be introducing him, as it might blindside my ex, and I've upset my partner by not inviting him.
AIBU?