Sanford is the worst kind of adulterer- the one who tries to justify his actions guised under dime store novel words and emotions.
The term, 'once a cheater, always a cheater' is completely fitting here. He lusted after other women, not just the one he 'did the deed' with. I had a friend once who believed that until she had sex, everything else was ok and wasn't considered cheating. Uh huh. And her stupid husband took her back- twice.
It is not wrong. I don’t think you can humiliate the guy he is so far gone.
He would have divorce papers so fast he wouldn’t know what hit him if it were me but he would have had those when he asked me to go see his lover. Reconcile with someone you cannot trust — no way.