Eterna had worked out that the two somehow knew each other intimately from the way Allison was acting but otherwise she was a little clueless. She also saw the effect that seeing Allison as a dog had had on Kenzi, it was all very interesting and would add an interesting dynamic to the game she was playing.
"You may, pick a dress and bra. No panties" Eterna told her somewhat generously, the girl would most likely change again later for the meet and greet. It would depend on the outfit and her mood nearer the time.