Not all that great. There's an interesting premise here that usually works very well in porn games, but QOS-Wife 2 drops the ball all over the place.
First of all the machine translation is astonishingly bad, to the point where even knowing who is talking or what is going on is a constant challenge. Pronouns change in just about every sentence ("he" and "she" and "you" and "they" etc seems to be used interchangeably, makes no sense), it just reeks of a horrible machine translation. Maybe if it was properly translated it could have been good, but I have no idea, because I don't know what the game is even trying to say, what game might be "below" the awful translation.
The game is also VERY bare bones. The world map looks like it was thrown together in a single day by a map maker on a strict and passionless deadline, and it is extremely confined.
All in all there is no passion in this game at all, it's more like they knew a QoS game would make good sales so they used that as a trope and then threw together something in a hurry to sell it. It's like garbageware on the Play Store, quantity over quality.
Even if the premise looks interesting to you, it's probably not worth your time. Too bad.