1) No, I want to keep making games as a living so I have to make money to pay groceries and rent to keep doing it, so I have to sell it. If you can't afford it, just pirate it and spread the word if you like the game.
2) There will be 8 matrons in the final game, each with 3 sex scenes, there's also some secondary characters but I haven't decided their content yet
3) I have no idea, idle-style games can last a lot if you really want to max out everything, but the main story will be completable in 4-6 hours
Thank you for your review!