Celia was certainly caught off guard. the sudden yank on the chain connecting her nipples made her hands scoot out from under her on the smooth surface of the desk that was slick from her saliva she bumped her chin on the wooden surface and nearly bit her tongue, which was still painful from earlier. Fortunately it had stopped bleeding or she would have left bloody smears on Mistress' desk.<br/><br/>"Nggh" Was all that escaped her mouth, but then her sex was invaded brutally by two fingers, that thrust hard inside her. "Hhhhppphhhh!" She managed not to cry out, but the sound that did escape was unavoidable. She had pleaded with her eyes to be allowed to make noise again, but apparently this test was not over yet.<em>Fool!</em>Her mind told her,<em>She will make you cry out and then she will break your heart. You should have accepted the offer to be taken home earlier, then you wouldn't be going through all this!</em><br/><br/>The pain in her nipples increased, and then her buttocks were bumped hard from behind. This time her feet skidded out from under her and her torso and belly hit the desk hard. It did rather have the opposite effect from the one her mistress desired, though, as the breath was blasted out of her in a single whoosh. She lay sprawled on the desk-top, gasping to get air into her lungs, the the involuntary wheezing something she could do absolutely nothing about.<em>Shitshitshit, I'm going to die, the bitch is going to kill me. Need air!</em>It was probably only a second, two at most, before her diaphragm got working again, and she sucked in a huge welcome lungful of cool air, then coughed completely involuntarily, and despite trying to suppress it.