I restarted game two times :D First time because I have chosen the "slave" path for them too (I like to dominate and etc), but after all I found this path unacceptable for me because Nia and Sylvia realy do not deserve such attidude in my opinion, so I decided to start all over again and chose "love" path and I like it much more now. Second time I started from the begging because of bug.
Anyway, it is up to you :) As I undarstood, Runey updates both paths and there will be events for "slave" path too.