I can understand where you are coming from. When making a transition not supported by the rest of the family, reaching goals can be hard. Lots of people losing weight or gaining muscle have to have extra hard because they have options before them.
Its much harder to eat your rice, chicken and veggies when there is a pizza on the table.
First I’d suggest trying to get your wife on your side. Working together means you can workout and eat healthy together. Having someone to help push you and hold you accountable goes a long ways.
If she doesn’t want to do that, you’ll have to put some extra effort into eating healthy. Prepare your own meals ahead of time and be sure to stock up at the store. Be sure to crowd out on your food so you dont have room for the junk.
Best of luck.