She makes her pluck it all.

"Sit down here," Bianca said, indicating the floor at the foot of her bed. "Now spread your feet apart. Good, just like that. Now take your phone out, and set the camera to selfie mode, I'll be right back."

Bianca returned a couple of seconds later with tweezers. "I'm going down to the dining hall for dinner. While I'm gone, I want you to pluck every hair from your pussy and ass-crack. Every single one, one at a time, and you'd better be done by the time I get back. I want you to record the whole thing on your phone so you can show me proof when I get back. If you finish early, keep recording and play with yourself. But no cumming!"

Bianca walked out of the room, leaving Amy alone, holding her phone and a pair of tweezers. She felt utterly helpless. Bianca wasn't even here, and she would still have to do what she said. Amy didn't know how long it would take to pluck every hair from her pussy, and she didn't know how long Bianca would be gone to dinner, so she hit record on her phone and got to work, praying there would be enough time so Bianca wouldn't have an excuse to punish her.

She used the phone as a mirror, and winced in pain with every hair she pulled out. She didn't know where to put them so she set the hairs in a pile on the floor next to the bed. She hesitated every time, fearing the pain, but she feared Bianca more, so she kept going.

Despite the pain and fear, there was something about this situation--the camera recording a close-up of her pussy and ass while she hurt herself, debased herself, at Bianca's order--that turned Amy on, a little. Maybe more than a little. Maybe Bianca was right, she was a submissive slut. This admission humiliated Amy even more, which, in turn aroused her even more. Amy plucked faster, tried to ignore the pain--not only because she wanted to follow Bianca's orders and finish before she returned, but also so that she could touch herself.

Suddenly, the door swung open and Bianca strode in.