OP, have you made any progress on this? My initial reaction when I saw your post was, "No! Don't tell her!" because I felt like there was no point hurting her if you were past it. The more I read the thread, though, I saw that scripturally it may be the right thing to do. I think she can understand that you have struggled with this, and she can help you as your wife and life partner. I just think it's important to be delicate about how you tell her in order to hurt her as little as possible. Just right from the very beginning make sure she knows this was in the past, and you're already done with it because you love God and because you love her. Just don't hurt her for the sole purpose of clearing your guilty conscience. Like I wouldn't want to know that you still think about your ex that way. That would only hurt. There's nothing you can do to stop that except redirect your thoughts to something else when you recognize that you're doing that. But the porn is so etching you can actively, purposefully not do. You know what I mean? I just hate when a spouse hurts their spouse with confessions of something long since past that will only hurt. So be careful how you do it. Pray, pray, pray for God's guidance. Pray before you do say whatever you're going to say. Pray with her that you'll have the right words and that she'll have a heart if forgiveness. I'm just sharing my thoughts and feelings here. Don't listen to anything that contradicts what you've seen in scripture or heard from the Lord. God bless.