Just caught up. I didn't read the series seriously first, but it's been quite the ride.
I really don't get why people are fearing a "redemption" arc. The worst that can happen is Ichirou wishing for her happiness more seriously and moving on. But her sincerely apologising and justifying her actions seems improbable. It is very clear from what little we know that she is supremely manipulative and evil, and has never really been a proper wife at any time. She likely chose the most malleable and easy mark as her husband. She destroyed his sexual confidence to make him easy to manipulate. So if there is going to be a "redemption", it will need to be quite detailed and long.
Anyway, I don't know what the President is thinking, but at least I trust th author to not be stupid. Given the depth of the trauma MC has, this will probably be a good opportunity to deal more firmly with her trauma. We alsoa ctually know very little about what their married days were like. So I am not that worried
edit: Wait, there was a mantion of Menka doing "sugar daddy" type things. It's possible that's the "secret mission" that's being talked about. So the MC will assist in whoring out his ex-wife. Damn