There was a moment where she was worried. She realized that she had no idea where she was. No idea who the guy in front of her was. No idea what happened to her sister. No idea what she was doing last before she just woke up here. No idea who put her in this underwear, which was definitely not hers.
But then the man in front of her said something. The moment passed. She giggled and unhooked her bra. There were worse thing that could happen? Why worry?