Overbearing sibling

Hey ladies! So this morning I just found out that my step sister, who is an RN, just transferred jobs to the hospital I will be delivering in and applied for a position in labor and delivery. She ended up getting the job. For most, that wouldn’t be an issue. But I have stated several times that I didn’t want visitors until we got home, even though covid may fix that for me. This is a very special moment for my partner and I and i want it to stay between us. She is an extremely nosey person. But she has been so determined to get in there that I feel like this is seriously just a scheme to do so. She even told me if she couldn’t get in she would have some of her nurse friends come check my son out. What? NO. I don’t think so. She’s told me she wants everything that she’s bought for my baby back, when she has a baby. She is not yet pregnant, but my whole pregnancy has consisted of when she has a baby. She’s even let me know that she’ll be announcing she’s pregnant right before my son is born or right after. “Probably.” I’m such a nice person and I hate hurting feelings but I feel like my privacy is being walked all over. Is there a way I could ask my doctor to prevent her from being in the room or coming into the room period, when my son is born? I just feel helpless, like someone has an ulterior motive for the birth of my son and I can’t stop it. 😒