My XH uses prostitutes.
Fortunately I never had to listen to the selfish bullshit that it was a 'sex addiction' 
He "didn't know why".
It cost him his marriage, cost me my marriage, cost my daughter her lovely two parent childhood. And yeah - she's happy now in two separate happy homes, but I'm lying to myself if I try to pretend she wouldn't rather she lived in one home with both her parents.
So...
He was reticent and slow moving with me when we met.
I thought it was because he was shy and inexperienced 
He has continued to fuck prostitutes - my daughter's stepmother has already dumped him then taken him back because "it was only once". FWIW (anecdote I know) he told her "everything" - certainly he told her that he'd done it to me, and before me, and gave some bullshit reason about childhood. Told her more than he ever told me - to this day, he's never actually admitted it. Despite rather a lot of evidence 
So - from her point of view, he's told her everything when he didn't need to. Except when he said it was only just the once to her. Nope - rather a lot according to his AW account 
He looks so honest though.
Oh and I'm sure she thinks he's a great father. She won't know that his involvement with his child rather coincidentally stepped up to impress her. That may sound bitter ex, but it's true.
There's just rather a lot of drama, no?
As I said before - interesting that just 6 months in you know how much his child support is.
Be very very careful.
This isn't just something he did wrong in that moment. It's the sustained ability to allow himself to treat his wife like shit.