Hey, welcome.
After reading your story, I'm reminded of the a lot of my own journey. I've struggled with PMO for YEARS, but always believed the lie that it would get better when I got married.
Anyway, I want to say you're doing an awesome thing by telling your wife every time you slip up. I do the same thing with my wife, and it's only deepened our relationship by working on this addiction together.
I just started reading a book (and I don't really enjoy reading) that I recommend you take a look at. It's a super short, fast read that is very concise and to the point.
You can check it out here.
Praying for God's blessing in your life and marriage, brother!