Next Sunday we are having our baby shower for our first child. My partners mother wanted to help host the baby shower since we had the gender reveal at his dad’s house with his step mother. Some back story on Tina (step mom’s fake name). No one is really a fan of her. My partners grandma lives with his dad and Tina and she’s horrible to her. She never acts up when we are around but there’s been a lot of drama on her part. She’s just straight up disrespectful of everyone. Treating his dad like shit too. We are cordial with her but cannot stand her. At the gender reveal she got drunk, all of our friends tried to avoid her. She said some disrespectful things to my mother and really just made a fool of herself. She doesn’t get along with my partners mother. His mom can be civil around her but Tina doesn’t have the capacity to. Not to mention family from his mom’s side is going to be there and I already know she won’t be able to keep her looks or comments to herself. Partners dad also can’t seem to get along with my partners step dad so I really don’t know how to approach the situation. In a perfect world I would have everyone there. But I want to avoid drama and want everyone to enjoy themselves and it not be awkward. But I feel like I would be an AH if I don’t allow her to come. Thoughts and advice?