Also: Since he was "forced" to put the info about his infidelity into the book, he might as well go about and do it.
Apparently, he felt it was a sensible explanation when she asked him why he cheated. It's insane.
He's clearly a man of deep integrity!
He is so committed to honesty that: if he says he cheated with prostitutes, he must then do so. Otherwise he'd be a liar, and that's just unacceptable!
He values consistency so highly that: having paid for sex once, he decided to do so every couple of months for three or four years!
He values his honor and reputation so highly that: he files criminal charges and sends legal letters in a manner that can be charitably described as unserious.
He values his wife and family so highly that: oh, wait... he doesn't value them at all.