in the grand scheme of things 4 months isn't very long to change a lifetime's worth of eating habits. personally i'd still try to remain more vigilant than lapsing into ice cream and soda a few times per week.
having treats every so often is fine, but i think the longer you go without stuff, especially commercially-produced cakes/cookies/etc., the worse they taste when you do finally cave. i absolutely cannot have store-bought cakes or cookies anymore. they smell weird and even a bite is just gross. the smell of soda is offensive too and as a teen i lived on diet pepsi.
have fruit and heavy whipping cream. have amazing chocolate. have duck-fat french fries, or sweet potato wedges roasted in bacon fat. have an awesome treat, instead of junky garbage food.
and mebbe have a talk with your wife about why she wants to sabotage you? you feel great and look amazing, right? does this threaten her somehow? would she say a little whisky won't hurt to a recovering alcoholic?
As I ate the oysters with their strong taste of the sea and their faint metallic taste that the cold white wine washed away, leaving only the sea taste and the succulent texture, and as I drank their cold liquid from each shell and washed it down with the crisp taste of the wine, I lost the empty feeling and began to be happy and to make plans.
– Ernest Hemingway