Beach,
The truth is....
One word....done!
Only the addict can stop themselves.
I would run away as fast as I could.
You kids do not deserve any of that insanity.
Making a new life without a cheating actively addicted insane anchor will be 10x easier.
For some reason even as an ex active addict reading about active addicts pulling these selfish moves makes me sick.
I am not sure what they teach in rehab, but from what I have learned here and there, there are definitely no guarentees.
Your children are in danger. I would quietly, while she was passed out, take the kids and move out. Call the cops if she comes near you.
The cheating thing gets to me as well. Mix that with the drunk and irresponsible and it is over and out.
Wish I had a better answer, but if it quacks like a duck....it is a duck.
I'd get busy.
Thanks.