My husband doesn't view what happened as cheating. He was speaking with a co-worker inappropriately and things blew up after I found out and about a month or so later he told me he wanted to be single but we talked about a boundary of no sex with anyone else, he ended up having oral sex with this women but because he was "single" in his mind it wasn't cheating, even the inappropriate messages he doesn't view as cheating. He says they were "just friends". If I spoke to a male friend in this manner he would not be okay with it. How do I get him to understand? He says he knows it was wrong what he did but I think in his mind I'm overreacting to the situation.