The next game will have 1 character whose goal is to have the perfect heir to her bloodline. It's a kink that's asked a lot, so we'll put it in that way, and see from there.
It won't be the sole focus of the game, as I've said before, we try to be vanilla+ and have a bit for everyone. But yes, it is already planned for Magical Monstergirls Academy 2 :)