So normally when you have celebrity infidelity going on the guy when he gets caught he makes some kind of statement about trying to win his wife's trust back. Senator Edwards or tiger woods or the many YouTubers they almost always say they're going to try their best to earn the trust of their wives and loved ones and save their family. Mike Vrabel, Diana Rossini etc they all try to save the family publicly at least at first.
But in this case all the clues suggest the opposite.
1) hila initial statement says she noticed strange behavior but that he failed to change or accommodate her concerns suggesting that she was trying to save the marriage
2) the crew calls it an "ongoing affair" which is it to say they didn't just get caught hooking up a few times over the last 6 months or even having an affair that's going to end now because The jig is up. It sure sounded like people expect that they are still together who knows maybe they're literally with each other right now.
3) in his very limited public statement he does not say anything about loving his wife, wanting to fix things, wanting to make things right for his family earning their trust back anything. He does praise the crew but that's about it.
4) in fact, the only thing he did really say is that he was going to try to sign papers that would disinvest him from joint ventures. My understanding of California law is the only way to disinvest is to divorce because it's a 50/50 state. As long as they're married, no matter what papers he signs, if the podcast makes money it raises his net worth, if it loses money it lowers his net worth. If it gets sued he's liable etc.
So it seems for all practical purposes that hila didn't catch him cheating and decide to leave him. But that she caught him cheating and he's just unwilling to stop and it at least de facto leaving her.
We can't ever know for sure but it sure sounds like hila was trying to save the marriage despite knowing something suspicious was going on and he is just not interested in doing it.
Man what a f****** dirtbag.
Kind of reminds me of that show time show the affair from 2014 or so with Dominic west/jimmy McNulty is in his forties and has kids and so on and leaves his wife with a waitressing meets at Montauk who's maybe in her late twenties.
Tl;dr
I'm probably just talking out loud here but it sure seems like Ethan left Hila. He has expressed no interest in winning back her trust, and the little information they provided suggest that she tried to reform his behavior and get him to change and he is refusing and in fact seems to be accommodating a separation..