You've obviously never played through all your options. Riley is ENTIRELY about D/S. She clearly states, in your first meeting, that she likes both options, and you can choose either path with her. "ZERO D/S in Ripples" my ass. The traits are in the game code: Assertive/Passive points and Dominant/Submissive points. You are wrong both figuratively and literally. Back the fuck off.
What I meant by "perfect harem game" is that all the choices are great, and there isn't really a barrier at this point between pursuing all the girls. The tensions between Skylar and Jessica routes even seem to able to be worked through. Luna is more of a barrier to pursuing Skylar than Jessica is.
And by the way, there is no Incest tag, either, but...