AND WHERE THE HELL ARE TAIGA AND ILLYA IN THIS ORGY?!
Taiga probably set this all up D: she probably has Cameras hidden everywhere and is keeping Shiro busy with kendo practice D: and Ilya is probably watching them practice kendo
Knowing as we do that Illya's nowhere near as innocent as she seems, I'd wager that she's got a webcam hidden among the cameras and she's streaming the whole show onto the net.