Underdelivers and didn't excite me.
Storywise, making 2 routes was a mistake. The MC is a cunt, and he continues to mistreat his mother even in the love route, there is no "love" in the love route, at least not from the MC. If anything, it should be renamed into the "non-sharing route", because this is what you gonna get.
The MC doesn't love his mother, he doesn't even call her "mom" in the post-game of the love route, for an incest game this is weak.
You could easily replace the mother title for his "friend hot's aunt" and wouldn't make a difference, because the MC is sadistic loveless psychopathic, and only cares about raping the woman that happens to be his mother.
And worse of all, the "love" route is just half of the game. You don't get to explore her exhibitionist side on the love route, like mating with her around the city, near that boy that had a crush on her, outside her husband's office, anything!
Underdelivers, the main mechanic is training the mother while the father is near but the game doesn't capitalize on that, he is not completely unaware of what is happening, THE GAME is completely unaware that he is there, he is not in the CGs (but one), he interacts with them during scenes only 2 times, so even the NTR aspect is underwhelming.
Overall, I just don't give 1 star because the game is not a broken grindy mess but I was soft during my whole 2 walkthroughs.