I think the OP seems to be doing exactly the right thing in making herself heard and demanding he see this feedback. I think what's vital here, is the relationship can go on, is that he see and acknowledge that his actions have been incredibly disrespectful, immoral, cruel and even a bit dangerous. If he can concede that, explain that his impulses were what they were (a thrill, power, control, sexual gratification) maybe they can move forward. Also, embarrassing him by telling other people (his friends or whoever) can really help open up something like this, and reveal to the OP that it is not she that should feel dirty or ashamed at all, but HIM.
I think the most important thing is that he convince the OP he's sorry and he understands.
Because, to my mind, this is not one of the most shocking things I've read on MN, and to me, I can very much guess what was going on inside his stupid head. For me, this would not be in the same league as a long term affair or similar real world betrayal. It's puerile, stupid and humiliating, and could have impacted her life in a totally horrible way, but he might not have thought it through as he should have (which is pretty bloody cold and/or dumb).
I'm not trying to 'normalise' it. But I think some of the voices here are sounding like maybe he did this is cold blood, in a psychotic, incomprehensible pre-meditated act. That may be the case, only the OP can say, but I really doubt it. Sounds to me much much more like a case of a man playing at having the sexual allure of 'his' attractive woman for a while, enjoying the power and control that men sometimes feel they lack in sexual and dating scenarios, and doing something utterly nasty and wrong in a 'virtual' world whenever he gets 'spunk-drunk'. Dreadful, selfish and infantile. For me, enough to warrant a huge relationship crisis, counselling but not police action and/or divorce.
If he can't see her point of view about her photos, her sexuality, her very self being made available sexually online without her permission, he has real problems with empathy and respect and I would then suggest the OP reassess her view and relationship.