my mom is threatening me for grandparents rights & im just 9 weeks...

Seneca
My mother an I got into an argument a little over a week ago.  We have had problems on & off for about 8 years and the argument had nothing to do with the baby but she tries to text me whenever we get in an argument and act like everything is cool but my feelings are always still hurt.
So today she group chat me and my husband with a picture of a pregnancy reveal because we were talking about this when I first found out I was pregnant.
I nicely asked her if she could not text me because I'm not over our argument and if she wants to text my husband just text him directly and keep me out of it.
She tells me she will texts me if she wants and that she is going to hire an attorney for grandparents rights so she can see her grandchild.
Mind you i never mentioned keeping the kid away from her but the fact that she would even threaten something like that makes me not trust her .
I looked it up and in the state of Ohio it seems like a grandparent would only be granted this right in extreme cases such as 
1. If one of the parents die
2. Unfit parents
3 parents are divorced 
4 parents aren't married 
None of these apply to me or my husband.  Has anyone ever heard of anything different??
Me and my mothers relationship is so damaged, I'm starting to wonder if I even want her in my baby's life ....
Thanks for reading