I am not fan of flatterer but this game is really amazing. Great renders and very quality animations and story. I know this is a porn game but "in my opinion" mother should be more loving. Because primary ingredient in any popular incest story is (are you ready?)... love. It's true. Lovers of incest want to see love, and they want that bond to be so overwhelming the two (whether it's brother/sister, mom/son, father/daughter, doesn't matter) simply can't deny it—the very strength of that love is what compels them to commit such a taboo act. Yes, sexual desire, teasing, obsession, all of those are involved in the beginning, but ultimately, readers (most of them) want to see the emotion driving the characters. If you can give readers that, in whatever pairing you're writing, you're already halfway there.
Another aspect of incest that you have to pay attention to is dialogue. Remind readers of the familiar bonds by having characters state them—often. Have the brother call his sister "Sis" or "Sissy." In father/daughter stories, the daughter should call him, "Daddy," and in mother/son, "Mommy" should be reiterated (as in, "Mommy loves her little boy...") Without this, all you've got is another sex story. When you focus on those familiar bonds, you give the readers what they really want—the extra heat of the taboo. Just having related characters isn't enough—they have to be extremely aware of that relationship and find it arousing. I know there are many other games like i describe but this game is great and i don't want it to go down. This is my humble opinion though. Keep up the good work dev. I am rooting for you.