Not your problem dude. So don't make it yours especially when you already have one problem that you alone are in charge of right now. That is probably the hardest life lesson I have ever had. Took far too long to sink in. I am a helper. That is my natural instinct and it is not always a good one. Sometimes you can not be in charge of making things better. There are other adults in the room and whatever happens is not your responsibility.
Eye for an eye makes everyone blind but that is not the essential issue. She knows you are in a place where you need to focus on you and she calls to cry and hyper-ventilate about the situation she created for herself? Hard facts: Sounds like she either has no idea what you are trying to accomplish for yourself or she does not care. No rational person puts such an extra burden on one who is already carrying plenty of load. Not if they understand what caring is about anyways. I am not at all saying she is not a good person but perhaps she is oblivious to the fact that she is putting a tremendous burden on you in a time where you need no more. You can not be good for anyone unless you put yourself first right now. Codependency is not a wise replacement for booze. I know that sounds harsh and is easy to say from a far but I have been in your shoes and am on your side.