Nathan's Sister walks in.

Kim could hear Nathan pulling down the hem of his pants, ready to whip out his cock and ravish her from behind. She was too scared to move, to afraid of what would happen if she refused him. But, just then, she heard a knock on the open office door.

Nathan growled in frustration. "What are you doing here Zoe? Can't you see I'm busy?"

Kim strained to turn her head towards the door. It was her, Nathan's sister. Kim almost forgot that she was also part of the family. She was dressed in a flowery bathrobe, and her black hair was still wet. She must have showered recently.

Zoe put her hands on her hips in a pouty way, as if she was thinking of some retort. Then she looked down to the naked Kim, bent over the desk, ready to be fucked. Kim looked her in the eye, hoping that she would do something to stop this. But Kim saw something in Zoe's eyes that she didn't expect. Lust.

Zoe bit her lip. "Oh, you know, I heard you were going to take Kimberly for a spin." She looked down at the horrified girl pinned under Nathan. "I thought I'd come by and watch."

Kim was mortified. It wasn't bad enough that she was going to be used. Now she had an audience.

Nathan grunted. "Fine, just so long as you don't make too much noise."