...I was never, even after cutting off all money to my wife, able to keep her from getting alchohol. In fact, it got worse. The ironic thing for me was how clever she could be while stoned and/or drunk, around finding a way to get more drugs and wine.
I truly wish the best for you and your children.
Please find an Al-Anon meeting my friend. Please. Even if it is inconvenient or you have to get a babysitter or drop the kids off with reliable friends or family. Here's a hand:
How to find a meeting in the US/Canada/Puerto Rico