The Rani has been watching this exchange with amusement and not a little horror –because isn't it horrifying how easily they slip back into their old roles now: Koschei pushing Theta and Ushas waiting for them to stop being stupid little boys and to get back to business, and why the hell is that all coming back so vividly–

When the Doctor finally addresses her, her answer is probably entirely unsurprising: "As far away from you two as possible."