To add or not to add, that is the question...

So I'm gonna post here since many of you know me and relationships with parents and kids can be controversial.

My mother sent me a friend request this morning and I've been debating on whether or not to accept it. Its been eating at me all day.

Reasons that are keeping me from adding her:

-She's used my identity to put me in $70k+ debt.

-Took a cable bill out in my name.

-She's been an abusive alcoholic pill junkie since I was 10.

-She lied to me about her pill usage during her pregnancy with my sister and now my sister is delayed for her age.

-She doesn't seem to care about my brother. She didn't react at all when I told her he was struggling and having violent thoughts.

-Didn't care that my grandpa has Stage 3 COPD, almost Stage 4 and could die soon.

-I've spoken to her twice during my whole pregnancy. I saw her once for my sister's birthday in January and I talked yo her once a couple weeks ago. She didn't even call me on my birthday in February and when she called a few weeks ago she didn't even ask about her grandchild. She didn't know his sex, due date, development, nothing and she didn't ask.

-Social media is a huge part of my life, or it used to be so she'd be included in a lot more than she is now, which I'm not too comfortable with.

Reasons that I'm thinking of adding her:

-More of a connection to my sister, which is the only reason why I still have contact with my mother.

-She's still my child's grandmother so I feel guilty about not allowing her to see pictures and watch him grow from afar.

That's pretty much it. 😐 What do I do?