First off, I'd like to say that the reason people Molest isn't always because they're Paedophiles. Sometimes they got stressed and "regress" to Children, but aren't necessarily primarily attracted to them.

Of course there are guys that can be attracted to Women and Little girls! Many of the people here are that way. Not everyone's "exclusive". You need to talk with him. Ask him more about why he did it. If he's attracted to Children? Ask if it's exclusive, if he's still attracted to you. If he's not, there are options aside from divorce, and you need to discuss those.

Good luck, and we're all still here if you have more questions.