No one is trying to judge you or make you feel worse for whats happened. If you read around there are people that come to these forums after cheating on their spouses for years and want to fix themselves. Some have been in abusive relationships and were the abuser, others have done worse things. All we care about is that you admit your faults and are working toward fixing them. There might be tough love involved but the people here really do just want to help you. That sometimes involves digging deep and bringing up things that are painful.
So you shared these pictures with the site even after she asked you not to, we can see how it was a break in her trust. What motivated you to do it. Why did you need that outside validation of how good she looked from strangers to feel better about you or your relationship. What was missing in either to drive you to do it.
We know what you did, now try to answer the bigger question of why you did it and how do you avoid doing anything like this in the future. Its easy enough to say "ill never do this again" but if you don't correct the cause its possible it will.
This is a safe place, no one is trying to get info just to humiliate you. We all have things we are guilty of doing in our M that led to its breakdown that we regret. All we can do is fix ourselves and move forward with our lives being a better person than we were before.
Accept what is, let go of what was, and have faith in what will be