Sooooo my BF mothers always having negative stuff to say about me. She thinks he pays for everything…

Sooooo my BF mothers always having negative stuff to say about me. She thinks he pays for everything baby (I wish) and she still hanging out with his ex. So he told me he didn't know how to tell her he doesn't want her at the hospital.. Immmm sooo glad! Cause I was gonna tell him Tuesday night. She has 3 kids and didn't parent any of them! So her being a grandma to my daughter is not sitting well.. Especially if she always have negative things today.. I'm soooo close to going off! She never shows any feelings like that to my face but he tells me what she says after he goes off on her.