Quote: When my husband would get drunk, I'd do my darndest to seduce him...can't do that with my mom!
what I mean is did you get mad at them and want to "mother" them? or did you accept that though what they had done to themselves (getting drunk) was irrisponsible and not good for them, it was their choice and not get angry at them but be helpful (am I telling you to be an enabler, I hope not).
I guess it's just best to realize when she (or anyone for that matter) is drunk they will not be themselves and all you can do is try not to react to it. and if that means you must remove yourself from the sit to avoid being sucked into a conflict then that is what you do.