Kat grimaced at the prospect of moaning for him and giving him any sort of pleasure, but her not living up to the agreement could very well cause the girl to suffer.  The traitor however decided to force the issue, after another crack of the rod he turned the dial of the device within her up to its maximum level.  Without any control she made a noise that was a combination of a shocked gasp and a pleading moan.  Her inner muscles began spasming almost instantly, unaccustomed to such intense stimulation.  They gripped the wide vibrator in tight waves, over and over.  Her eyes shut tightly, wanting to block out the entire scene as anguished cries continued to resonate from her and her body jerked against the tight chains that bound her.  The only thing that interrupted the rhythm of her tightening muscles was the sting of the rod on her posterior once more.