Mom Involvement??

So I just found out I’m pregnant recently and told my mom. Her and I aren’t that close at all, but I figured she should know. Now she’s saying she wants to be there for the birth and is going to be so involved. She also wants me to rehome my pets because it will be “too much for me”. My mom has never cared about my life or wanted to be involved until now, and I know it’s only because of the baby. She even said she would have another baby herself if she could (her tubes are tied) and I’m already feeling uncomfortable with her suddenly wanting to be in my life. She was pretty physically and emotionally abusive when I was a teenager but I thought I deserved it so I didn’t see it as an issue until I was an adult. I’m scared to have her around my baby too often because even when I’m babysitting my niece and nephew and she’s over she will start screaming at me over nothing in front of them and threatening to hit me, even though I’m an adult. I have a lot of trouble standing up for myself with her. It’s still very hard for me to not be manipulated by her and I don’t want to put my baby in a bad situation. How do I tell her that I’m not comfortable with her being around 24/7 and being super involved? She has been pretty terrible to me as an adult too and it’s such a confusing relationship to navigate even when a baby isn’t involved.