You were noble girl who frequents the castle, due to the importance of your parents. This means you're within reach a good amount of the time—not that he couldn't summon you, or anybody he wanted to, at his whim, of course. He treats you differently from all the others that he tangles with. The princely facade, though thinly worn to begin with, is discarded completely the moment you're together. He knows how far he can push you, that you will take everything he gives