Basically, my fiancé's biological mother has done quite a few things to hurt him in various forms. She is not somebody that is easy to deal with, and I classify her as a toxic person. We refer to his best friend's mom as his mom, as she practically raised him through his teenage years and has been there for the both of us throughout our adult lives. My fiancé is an incredibly forgiving person and has been able to get past all of the things that his bio mother has done, and while I am still not able to forgive her, it is important to him that I at least put in a good effort to be cordial and polite, which I am fine with.
The issue is that his "mom" wants to take care of planning my bridal shower. I would love for her to do that for me, and I'm already getting excited about it. However, I know that she will not want to invite any of my fiancé's bio family (his mother, his sisters, his grandmother....) and I'm a little worried about that causing some issues. I'm honored that she wants to do it, but I'm afraid that if I tell his mom that they really need to be invited she won't want to host the shower anymore. I have no idea what the right thing to do is, and I really need some advice. Thank you!