Also, the Beast of AVRT is the desire to get drunk/high. Step 1 requires acknowledgement of powerlessness over the desire to get drunk, which, by definition, is the Beast. If you are powerless over the Beast, does that mean that the Beast then is your higher power? I don't know how you would reconcile AVRT with that, which presumes that while the AV is very clever at getting you to drink, the Beast is ultimately powerless, since it can't directly control your muscles and pour that drink down your throat.
I think you'll find the RR book interesting, though, given your current situation. It has a section devoted to navigating the waters when you are in a relationship with an addicted spouse.