I've told her nothing of the sort, nor will I.

[A tic jumps in his cheek. Still managing to keep from losing his temper, however. He won't mention that he told Wichita to give Sirius his wand; he doesn't want him knowing he advocated that.

Coldly:]

She hasn't told you everything. Not if your sole concerns at the moment are my presence and Potter's happiness. Everyone on the ship will know the moment you learn the truth.