am I being to harsh?

So I’m writing this text to send to my boyfriends mother and I need some opinions. When I say I don’t want her there I don’t mean when I’m giving birth I mean after he is born. She’s rubbed me so wrong the past 9 months by telling me I’m not capable of being a mother and telling me that I should get an abortion or adoption and I know she would never talk to her daughter n law (Jessie) this way because she is older than I am. (I am 21 and my boyfriend is 22 but we’ve been together for 5 years) everyone I’ve talked to has told me that it’s ultimately my decision and I’ve had some time to think about it but even after thinking about it I still really don’t want her there at all. I’ve decided that after my family and friends come and see him then i may let her come up since it is her first grandchild. And I know my boyfriend wants his parents to come. But the moment she starts acting up she will be asked to leave. What do you guys think about this text?