Just piling on with R2C and Kind here to say I'd suggest documenting her drinking at this point AND establishing a hard boundary around it with her. Lob some ideas at us and we can help your refine it.
Also, (noting that i'm not a lawyer nor qualified to provide legal advice; I just have some professional experience in this space), if things are really bad, you might want to talk with a L about how best to document what is occuring. In single party consent states, only one person (you) have to consent to recording a conversation with another person.
I'd consider this a 'nuclear option" because if your W becomes aware of it, I expect in most cases game over for that relationship UNLESS, maybe, she is an alcoholic and eventually comes to her senses about the risk she can be to your kids.
