And lastly,
Will this be explained in future updates?
That's it.
Thank you for making such masterpieces.
There will be a quest in future. First one is just telling players how important Ryoko is. There's no incest animation though. Those characters will simply not appear. It's just make people know walking on Ryoko's path is the right choice.
It was something that was going to be completely revealed in HTA 2.