Ok for background, me and ex have one DS (5) and have been separated for approx 2.5 years
ex has been with his current partner (A) for almost 2 years but been very on and off
me and A do not like each other. I tried initially to be welcoming / foster a good relationship with the woman who would be around my child but she absolutely was not having it. The relationship deteriorated quickly and there's bad blood there. We wouldn't argue in front of the kids or anything but very clear neither of us like each other.
anyway, onto the issue. DS is having a birthday party next month, that I am solely organising and paying for. Ex is invited as he is DS father and I do not want to exclude him from DS party, however I really do not want A there. I get she is a part of DS life but DS will be having so much fun with friends he won't notice her absence and frankly I don't want to be made to feel uncomfortable at an event for my son that I am paying for.
AIBU to say she isn't welcome to come?