Her clothes were taken out of the room by one of the maids, and at the time there were no other clothes in the chamber. This room was apart of Aaron's chambers technically, although they were a small distance away as well. After all he had to have somewhere that he could have fun, and know that somebody wasn't going to just come in. If this door was closed, it meant that nobody was allowed to enter.
While this was happening Tatiana found herself floating in the past, just watching the arrival of the new advisor. Man she knew that trusting the creepy man wasn't a good idea, but this seemed to prove it any more. From what it looked and sounded like, the man had filled her father's head with lies. Convincing him that the best course of action was to enslave everybody, force them to do his bidding.