Here we have a perfect example of how different our viewpoints can be!The problem is not the agreed on cheating (if we even believe fel).
Elias is free to choose not to entertain each and every whim of his wife. That is not the same as intentionally destroying and humiliating one's spouse in the social circle.
Elias blackmailing is immoral but affects fel zero.
The girls of PC might be interesting, but as women for a long term relationship they are all bottom of the barrel. Even hana is a perfect example for why one never gets involved with girls who have a bad relationship with their parents: sure enough she tries to get Edwin into trouble by getting him to do stupid shit around August, just because she gets off on angering her father.
The game is one long warning about women and their ways.
"Elias is free to choose not to entertain each and every whim of his wife." That is correct but you overlook here that saving her school is not just an everyday whim of Felicia. She begged Elias to save the school and made it very clear how important this place is for her. Elias could have saved the school with ease, even getting great PR with it. And more, he would have gained Felicia´s thanks and full loyalty. She would never have gone to PC. But Elias did not save the school.
"That is not the same as intentionally destroying and humiliating one's spouse in the social circle." While hardly a nice move by Felicia, the humiliation of Elias in the social circle is currently near zero. The vast majority of the PC patrons are rivals of Elias and/or disliked him well before Feli came to PC. This was actually one reason Felicia came to PC, it was outside of Elias´normal social circle. So currently Elias suffers zero problems in his social circle.