[ He doesn't particularly care how she knows, just that she knows. It could be trouble for him later, or it may benefit him. It's simply a fact he needs to keep in mind when dealing with Caren. ]

Yeah, that's right. Don't waste time on sentiment, just use me as I'm meant to. It's a pity most Masters hesitate on that. Servants are made to be commanded and are nothing more than familiars...