She finally notices

Finally naked except for her socks the itching seems to subside and Hanna takes a deep breath, silently plotting her revenge.

Of course, no longer distracted by the itch she glances up at the mirror, spotting the two men staring slack jawed at her.

She actually lets out a little scream, her hands quickly moving to cover her breasts and pussy, but the 360 degree view afforded by the mirror means that she can't cover everything at once. Sure there's the curtain and her clothes on the floor, but she'll need to uncover something in order to find more permanent cover.