My two cents.
The storyline is a bit ...not challenging, considering the sisters are hitting on you and your own mother even rapes you. Feels like the character is a victim, rather than a perv, who takes action on his own.
Also the action is going too fast. In 0.1 you are already fucking your own sister in the mouth(God is my witness i came on the scene with Caroline), in the first few days. The element of incest will very soon be exhausted.Not much room for additional action left, i guess or may be in 6 months we will end up fucking the whole town, but it wont be so much incest , right...just like in the Twist.
My suggestion is that the author should prolong the action of the incest with some big drama-event happening in the family, after which the MC should build up all relationships with his siblings from scratch. Or may be relationship decaying over time...
Other than that. Best visuals of a game so far. The animations are...out of this world!!!! Probably took him forever and so far the work effort done to the game is enormous. Amazing potential for the greatest game of all times. Honestly , this game so far gives you so much content, pleasure and "wow moments", that no other game has done so!
ICSTOR, dude, you are making history here!