looks like LOTS of awesome advice from those who have been involved with various types and forms of addiction/alcoholism! so many posts ... haven't read them all ....

let me add one ... only my opinion and someone may have touched on this, but don't know ...

I say this as a recovering alcoholic who was raised by 2 still very active alcoholic 70+ year old parents ... only the person with the problem can stop the problem. at 80 years of age, it is hard to imagine they will want to stop drinking unless it is a problem for them. you need to let go ... I would suggest Al-Anon to help you deal with learning how to let them do what they are going to do while you continue living your life without fear of enabling them to drink. Al-Anon is a great organization for supporting those who have to live with alcoholics in their life ....