Sam,
Welcome, glad you reached out. I am sorry for the pain that you are in. Yes our addicts do drink themselves to death. My axh told me that he had to die from something. Us codies cant comprehend the hold that the bottle has over loved ones. It is out of our control.
I also agree with the others, tell her that you love her and if she she needs any support, you are there for her. I would highly recommend hitting an open aa or alanon meeting for yourself. It is time in your life for self care, and they can help.
Keep posting, commenting, ranting, it all helps because we have all watched our loved ones suffer, we all get it on this forum. Hugs