Yeah! I was not sure if I was reading into it or not!

And I'd forgotten that Sarah doesn't know that Derek knows before the totally awkward conversation in the car.

I... yeah. Am not sure what to think. Part of it is because I like the Sarah-Derek dynamic right now, where he's this sort of trustworthy yet not completely presence whom she'll call for things she doesn't want John to know about. And the fight with the toothbrush in S1 and her position as the leader of their little family.