I’m pregnant how do I deal with my MIL?

I have posted a few times on here regarding my MIL and the issues I’ve had with her over the last 8 years! Well last year March I cut contact with her as she got drunk and punched me very hard on my arm and wasn’t able to take any consequences for it. She’s very manipulative and disrespectful. However I have just found out that me and my husband are expecting our first baby. This is an exciting time for us and I know eventually it will be time to tell his parents. However now I’m worried about how the future will be. I want my child to have a relationship with his parents especially as they are older (around 70’s) but I don’t know how to manage all this.

Me & his mum have never had a conversation about how she treats me we usually just brush it under the carpet. I know how much this means to my husband and I don’t want him to feel uncomfortable or divided between everything and I would want her to be part of our pregnancy journey. I just don’t know how to navigate this & how to make sure I protect myself through all this? I’m also worried if I start speaking to her she will become over bearing and want to be very involved and buy everything which I don’t want. Has anyone had a similar experience and how did you deal with if?