I've been married twice. Once divorced, once widowed. My ex-husband cheated on me and filed for divorce. We participated for a while in couples counseling. Although it did not work out for us, there is one thing the therapist said that has stuck with me all these years. If my husband did everything right (left the gf, plugged back into the marriage, etc.), could I ever trust him again? Knowing these answers for myself was key to my understanding whether my marriage could continue or not.
Let's say that your wife does everything right from this moment on. Completely embraces recovery, treats you with love and respect, gets all the professional support she needs...would you be able to let go of all your resentments from the past in time? Will you be able to live without throwing up her past behaviors if you two had an argument about something completely non-addiction related? Will you be able to trust her again?