Difficult family members 😥

Surely I'm not the only one! How do you deal with the mother of your boyfriend who is extremely difficult and hateful?? I don't want her at my delivery or at the hospital to be perfectly honest. We have gone toe to toe in an argument before that she had no business being a part of but made herself apart of. I honestly do lot feel like she has any rights to have a relationship with my child until she can sit down with me like an adult and we can have some kind of reconciliation. She bad mouths her own daughter to her grandkids and I'm afraid she'll do the same to me. I don't trust her and I'm afraid of what she's capable of. I'm afraid to leave my baby alkne with her at any point for any amount of time. How do you deal with this in a cordial way?!?!? 😩😩😩