Dying, is it? [he asks, mildly surprised if not particularly curious-- he doesn't care, after all. Good riddance, eavesdropping little creep.]
Whilst I am sure that is a wise policy, [really, good survival instincts there,] please be my guest this one time. With no repercussions, on my word.
[And Sebastian doesn't lie. Let's see how precise these alleged mind-reading powers truly are, then? He makes a conscious attempt to focus his thoughts on his contract: being bound to his master's word; working for his goals only; having no interest whatsoever in anyone else. No one here is in any way relevant to his master's goals.]