I agree completely with the advice posted here.
Please take the first steps to protecting your children. You cannot leave them in your wife's care. She is completely incapable at this time, and the results can be disastrous as you know.
Once you ensure their safety, you can breathe easier, and absolutely get to an al-anon meeting.
Keep reading and posting here, but first and foremost, protect your children from their mother. She may or may not ultimately embrace recovery, but right now this does not matter. She is harming your children, and they need you to do something.
You can do this. You came here, good first step. Keep on going.