[He doesn't miss the implication that joke could have, and is grateful his lighting spell probably isn't bright enough to show her the way her flushes. Hopefully this means she doesn't want to talk about Saber after all.] If you're sure.
[But as far as drinks,] I suppose making tea is out of the question unless we make another fire. [Which he could be easily talked into, especially if he can find an excuse for her to lean on him again.]