[ No, of course not, that would be extremely rude. Any momentary upward curve of her mouth must be a figment of his imagination, because she's back to normal, shaking her head as if nothing was wrong. ]

I am a proper maid, this is my fulltime occupation. Aside from being a shinki, of course. I would never put anything weird into the food I serve, I would have no right to continue to claim my position as the number one maid in Japan if I did.