B.C.
Tough question.
My uncle was a violent alcoholic.
One time he dropped his kids off at the orphanage where he spent some time as a child - yeah, they were closed down and boarded up but he was drunk - and the police called my M. and the family pulled together to put the kids up for a few days till their M. could be found.
Another time he was driving down the sidewalks through the city and when the police caught up with him it took 6 of them to hold him down and he spent 3 days in a straight jacket in a padded cell while he went through the DTs - when he sobered up he didn't remember any of it.
He went on and off the wagon for years before drinking (and diabetes) finally paralyzed and killed him.
You need the Al-Anon meetings so you can separate yourself emotionally from your M..
In her more sober moments, plan her funeral.
As for your kids and what to tell them, I found this:
"The National Association for Children of Alcoholics suggests that children dealing with family addiction learn and use the following "7 Cs of Addiction:"
I didn't Cause it.
I can't Cure it.
I can't Control it.
I can Care for myself
By Communicating my feelings,
Making healthy Choices, and
By Celebrating myself."
I think that's something you can use for yourself as well as for your kids.