It's a tricky one to call. I mean, on what I see here, it looks like it might have started out as a fairly standard sub/dom interaction, which is hardly outlandish in these sexually enlightenificated days. I mean it's a fine line between being submissive and being abused, the main standard being 'consent'.
I notice there's not much noise coming from the wife's camp, which makes me wonder how much of this she was originally agreeable to. They were together nine years, you say?
Still the whole contract deal makes him look like a pretty pathetic, whiny, needy dom. He ought to have tried a bit less hard. The key to domination is subtlety.