It’s the selfishness and the casualness of this man’s behavior that is so shocking (or, rather, would be shocking if we lived in a half-way decent society), he knows his wife would feel betrayed (read: violated, humiliated, horrified, and quite likely terrified too, as he now has images he can use to bully and blackmail her with if their relationship ever goes sour, and given what a shit he is at the moment, that doesn’t seem too unlikely), but he does it anyway, because it produces great porn.
I don’t know what exactly he means by saying he sees his wife “in a whole different way now.” This statement seems to be given as justification for his behaviour; now he’s turned his wife into porn, he can find her sexxxy, so he is justified in his duplicitous behaviour. Maybe their sex life didn’t ‘work’ for him before? Maybe he saw his wife as too much of a full human being, and that got in the way of him getting off? But now he’s reduced her to porn, turned her into a ‘whore’ (remember, the root meaning of pornography is writing about the lowest class of prostitutes), he finds it easier and more enjoyable to fuck her.