My Mother Is Trying To Get Grandparent Rights??!

Context:

My mother and I have always had a tumultuous relationship. She gave my dad full custody of me and my brother when I was 5 and he was 13. (Not even my dad's biological son and still adopted him.) She's diagnosed bipolar (refuses medication) and an alcoholic.

Spent every other weekend with her growing up, where she would have a new boyfriend every time basically. SA had happened with one of her boyfriends when I was 7. She used to take me to the bar with her while she would drink and I would play pool and drink Shirley temples. She would slap me, make me eat soap, etc, ANYWAYS bad childhood. My dad was my hero, always. He did what he felt was right by having me go see her.. I never blame him.

I always tried to have a relationship with her despite the abusive behavior I went through as a child.. but there have been many times we have gone years without speaking.

Fast forward to this evening.. I haven't spoken to my mother in over two years.. she sent me a drunken email stating she spoke to a lawyer and will be petitioning for grandparent rights..?!!!!!

I am in Florida and she is in Massachusetts. I am of course panicking as I've never experienced anything like this in my life! My husband said from here going forward we should only communicate with her through a lawyer, but I'm just scared and need reassurance so I don't lose my mind.