Advice?? Anyone?

So my fiancé’s mom made a comment about not being in the delivery room for her daughters. I don’t want her in there. But I feel like I can’t have my own mother in there because it would make her feel bad. But I also feel like she is trying to guilt trip me into allowing that. I also have made comments to my fiancé that I can’t trust her to babysit. She drinks fireball and beer every night and smokes in the house and I don’t want my baby around that. We also have family friends that are going to be our babies third grandparents and she is mad because our baby is allowed to call them grandma and grandpa too. I am trying to like her for my fiancé’s sake but honestly I just can’t stand her. I don’t want my child around that kind of negative person but now everyone is yelling at me telling me to suck up my pride and allow it because it’s his mother