[ He says it so smugly that for a second, Ai's tempted to really do it, consequences be damned, just to teach him a lesson. But even that would just be giving him exactly what he wants by proving that he's gotten under her skin badly enough to go to such extremes. If she'd thought ahead, she could have played along enough to try and turn this around on him... but of course, if she'd thought ahead, she wouldn't be in this mortifying situation in the first place.

She really should've just gone to bed. ]

You're the worst. The absolute worst.

[ Still muffled from behind her hands and sounding no less miserably embarrassed for it. Are everybody else's Servants this troublesome?! ]

Next time I won't even bother worrying about you! I'll just let you get in trouble all by yourself!

[ once again: she won't. ]