Shang Qinghua mentions that he has theories, but does not elaborate. Furina knows one with a secret when she faces them, but at least her secret has absolutely nothing to do with this predicament. Neuvillette would have told her if this was her punishment! He would not have lied; that is her role to play, between the two of them. So it's not hypocrisy at all, that Shang Qinghua's reticence irritates her.

"Why monsieur, you needn't hold back," she titters, with the sort of laugh that would always have defendants on edge in court. "I promise you, no matter how ridiculous the idea, I will not laugh."