I'm at a loss for words...

My mom called me and she was crying.. she can't handle my fathers alcoholic behavior any more. I'm happy for her honestly. I have kids of my own a great boyfriend and a decent home, but one thing I will never have that I'm so grateful my children have is a father figure actively present in their lives. I just needed to vent since I can't talk to my grandma about all of this (she recently gained her angel wings up to heaven) my grandmother raised me and I miss her so much. I feel so alone in the life even though I'm not alone. Whenever myself and my kids comes over to my moms its like we have to walk on egg shells because we never know what mood my father will be in. He doesn't care about anything but himself and its truly sad. My mom called me crying, she doesn't know how she is going to pay the Bills etc. Shes scared to leave but knows she has to.. I already been helping her financially with some bills that I can't take on anymore I have my own. And recently I got my pharmacy license and nobody cares about it but I knew my grandma would've been happy and proud of me. I don't know how else to help my mom and she cant be stressed out as she has a compromisedimmune system. I wish I knew what to do.

any advice or just kind words thanks

Edit to add** I know she could stay with me with open arms but she doesn't want to she wants to try this on her own so I'm trying to be supportive!