She invited a past lover to our wedding w/o my knowledge

The title pretty much sums up my problem. While I can see other folks on this forum have more serious degrees of infidelity I think this is the proper place to discuss my issue. Essentially, a few days ago while getting ready for bed with my wife she began talking about her past lovers and mentioned that she needed to admit something to me. This confused me because we already had the talk about "how many" and "who" when we first started dating 3 years ago. And I told her I was fine with that and that we all have a past; however, I never wanted to know the details because I personally could not handle them. Basically, she disclosed more past boyfriends than she recently disclosed, meaning guys that met her folks and she dated for more than a month, and noted that one of them was invited to our wedding and that I spent a lot of time with them same guy. When I asked her why she didn't tell me about this a year ago when she first introduced us she told me she wanted to keep their friendship and she knew I would not want to meet him. I feel this is a rather selfish motive. She assured me their relationship was brief and meaningless - but I am of a different mindset where when sex is involved then the relationship is at another level and should stay in the past. She is under a lot of pressure with work so I understand that maybe triggered her to come clean. At this point I feel she has tainted an important day/memory. I feel he probably got a fantastic laugh at my expense for going to a wedding in which he was with the bride. I want to delete/destroy all of our wedding photos and be assured she ceases the relationship. I feel this is not just a small lie but a large lie that I must now deal with. Again I am not bothered by her past but the fact that she lied and flaunted it in my face hurts the most. The fact that she would invite someone that she has been with truly hurts me to my core. She went away on business so we haven't had a chance to talk in depth. I am lost, I feel this is not necessarily a divorcable offense but at the very least a strike. I feel betrayed and hurt that she would not even ask me if it was ok that she invite someone like that when I was not allowed to invite any of my female friends to our wedding. I have searched the internet and the forums for something similar to this but I have only seen the issue at the forefront meaning the issue is resolved before an invitation is sent. Does anyone have any advice? Is this a divorcable offense? Could she be lying about other things? Or was this just her guilt catching up with her? Thanks all - I saw these forums, registered and hope I can engage in a meaningful discussion to help me resolve this problem.

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