Welcome to SR! Please do what you need to do to take proper care of yourself and kids. Your wife cannot fix her problem until she admits there IS a problem. And take away the car keys or call the law on her when she's diving drunk. It might actually be a blessing for your wife to go to jail but it might come at the expense of some other lives. Do'nt let her drive drunk if you can possibly help it.
Take care of YOU and your family.