Hi, my brother died from cirrhosis, it isn't the easiest, but I believe he has the peace now he would never have had in life.
I know, you want to avoid that, YOU can't, it's your wifes chioce.
I would have my brother here with me if I could have done anything about it.
It's hard but true, it's her choice.
You have a choice also, look after you or don't. Maybe the best is to look into alcoholism, al anon, and any other support you can find.
Learn about what's coming, and what you can do for you.