it could be that your level of intake and resultant actions made a nice cover for her own drinking....and now as the sole remaining drinker she has some internal conflict going on. she may simply like to drink, or be stubbornly hanging on to the drinking out of spite.
as you said, you drank a long time and did a lot of less that admirable stuff. who didn't right??? really your best course is to stay sober, no matter what. and all else will sort itself out eventually. give your wife the gift of time...time to figure her own stuff out, if she is going to, and time to see you stay sober on a consistent basis - be where you say you are going to be, call when you are supposed to call, come home each day and give her a hug.