It starts with us seeing him being pissed off and glaring at the MC for confronting the mistress. Then being all protective of mistress from MC. And then to saying that he love the MC and has no feelings whatsoever for the mistress. But mistress keeps saying they tgt. And then he does all this stunts to get MC back by saying that he will explain everything if they don't divorce but then proceeds to not explainಠ_ಠ(I mean like why not just say it first then let the MC reassess the situation). And then he even had the balls to suggest the three of them live tgt at the mansion(Like that would have helped in anyway with the current situation (⌐■-■)). He even brought the mistress to the MC's hometown. Like WTF! Stop acting like you a victim. And stop contradicting yourself.
I REALLY DON'T GET HIM. SO CONFUSING (ノಠ益ಠ)ノ彡┻━┻