If secondary Protoganist is optional, or just one or two choices, it's okay. But, this game gives significant amount of choices to the wife according to the dev, atleast in updates chapter. So, yeah, playing a major chapter dedicated to wife may not appeal to many people here, assuming most of the players are males & immerse themselves in male MC. And the important thing is, Wife have choices to cheat & pick NTR scenes. I know it's optional. We can pick choices for her not to do that, but still seeing those "options" itself will "irritate" lot of fans. Like there are already people who won't play game just because it has "ntr" tag. So, yeah, i can understand why he have a problem and doubts to play this game.
Well anyway, it seems after all these things, this game have some fans & they are waiting to play this game anyway. So, yeah, good for you. I too haven't played this update. Will see whether to play or not.