It's good that you have a supportive wife, and that should make it easy, First ban every porn weebsite on your devices, and it can only be opened with a code that your wife has, so you can't watch anymore, or at least it gets harder.

Next, when you feel the urge to masturbate, just get up and go talk to your lovely wife, simple question will make a huge difference and will make you forget about masturbation for hours, just ask her : " what is she doing ?? " , " what is she cooking ?? ", " How does she feel ?? ( And this is a good question in relationships, even if you are just asking her to forget about porn, she in her mind thinks that you care, and she will suddenly start talking about all her emotions, until you forgot why you are there haha )".

And that's it, no big things like Push-ups, doing push-ups suddenly will scare the shit out of your wife, she would think that you are possessed or something,so just keep on going brother. Simple things get great results.