Sebastian and Ciel's relationship has changed after their contract ended. Ciel is no longer serving the queen, but like always he's managing his business under Sebastian's supervision. I suck at summarising so I'll stop there. You can't judge a fanfic by its description, though it gives you an idea on how screwed up it's going to be.

Kaname and Zero can't control their heat any longer and does the unthinkable. They mated each other. What if their 'love making' made a life inside Zero?.