I've already stipulated that cheating and lying are not acceptable behaviors, but yes, they are indeed symptoms of this woman trying to break out of the domestic box that her husband (and society) herded her into against her will. She handled that badly, but it doesn't detract from the reality that she wouldn't have needed to do that if she'd been allowed to pursue the life she actually wanted - and not been forced into the one that he wanted and decided for her she'd come to accept and enjoy.

His attitude that he didn't really do anything wrong and "what the hell happened to her" to make her go off the rails deserves to be called out. Yes, she did go off the rails, but what instigated that? Trivializing the act of forcing someone who doesn't want children into not only having them, but giving up their entire professional aspirations to care for them is beyond the pale. You should be ashamed of yourself!!