Pulls down his pants.

You hear a zipper, then a soft fabric sound. Something warm and stiff begins to rub against your pussy lips. Evidently, Dr. Klein is being patient with the dildo. His dick rubs on your lower lips, pushing up against your clit, then stroking down along the labia. You shiver with anticipation. He rubs up and down, occasionally starting to insert, only to pull away after the merest hint of his tip enters you. Your anticipation is building and you are growing impatient.

"Fuck me!" you moan. Dr. Klein grunts, and you feel two strong hands close around your neck.

"Who the fuck do you think you are, slut, giving me instructions? What the fuck don't you understand? You're a whore, nothing but a collection of holes for my cock! You don't tell me what to do!" His hands grasp your neck tighter, and the only sound that escapes your throat is a low moan of arousal. He removes one hand, and you feel his finger start to press against your asshole, first gently, then more insistently. A splash of liquid that you realize must be his spit hits your asshole. He spits two more times, then picks up the huge dildo from the table and waves it in front of your face.

"As punishment for trying to give me an instruction, I should really just shove this down your ass without any hesitation. But, I'm a reasonable man, I understand it was the heat of the moment. So I'll give you two choices. Number one, I'll stick this in your butt like I was planning to. Number two, if you beg me, if you beg your Master, to fuck you in that tight, wet young pussy of yours, and I mean really beg, then I'll be happy to oblige."

The entire time, he continues his semi-chokehold on your neck, which is only furthering your horny state. The feeling of his dick rubbing on your pussy had been almost too erotic to handle, and you crave it inside of you. Without hesitation, you fully submit yourself to your role as a sex ****.

"Please, Master, please put your huge, hard cock in my tight little pussy," you begin. Dr. Klein taps your asshole with the dildo. Desperately, you continue. "Professor, I've wanted that monster inside me since you took me in this room, all I want in the world is for you to fill up my wet pussy with your dick! That's the only thing I want, I love being your slut, I am your sex ****, I want to please you, Master."

Your professor removes his hand from your neck, and places both on your hips. His dick starts to push between your pussy lips, then into your hole. With each passing inch you moan in pleasure, and when he bottoms out, you feel full, content, and uncontrollably horny.

"Mmmmmm," the sound escapes from your throat involuntarily. Dr. Klein begins to push in and out, slowly and gently, pulling back to just the tip before completely filling you up again. The feeling is unbelievable. Your knees buckle, your pussy is on fire, and your whole body is practically shaking with pleasure. He pulls out to the tip again, then suddenly thrusts in at speed, and the sudden stimulation pushes you over the edge for your second orgasm of the night. Dr. Klein's thrusts don't slow down, and you ride out your orgasm as he continues to jackhammer his dick inside of you. Your pussy walls are aching with lust, and you feel pleasure continuing to build and wash over you. He never lets up, and you experience three continuous, consecutive orgasms from his amazing dick filling up your pussy. You feel Dr. Klein's dick begin to pulse, and then his hot liquid spurts out deep inside of you, filling you, marking you as his. Any worries about the fact that he came inside of you are overshadowed by the deep feeling of pleasure that rules your body. Immediately after pulling out, you feel your professor spit on your asshole again, and then the plastic dildo begins to push into you. He covers your mouth with his hand to stop your protests as he pushes it further and further inside of you. By the time you feel the base of the toy press against your asscheeks, you feel as though you're about to burst. The sheer size of it, filling and pushing against the walls of your asshole, filling you up to a degree far greater than his dick filled your pussy, feels at the same time uncomfortable and incredibly arousing.

Leaving the dildo in your ass, Dr. Klein begins to finger your pussy again. He reached deep inside to scoop out his own cum, then reaches around and stuffs his fingers in your mouth. You instinctively suck the sum off his fingers, reveling in the slightly salty taste. The fingers pushing inside your pussy and rubbing your clit, combined with the huge dildo stuffed in your asshole, brings you to yet another orgasm, this one leaving you shaking, gasping for breath. Finally, the toy is removed from its position deep within you, and when it's gone, you feel strangely empty, as if the fact that neither of your holes are filled is now somehow unnatural or uncomfortable. Dr. Klein makes you suck your juices (combined with some of his own) off of his fingers again, then walks toward the closet. He comes back with a pair of scissors to cut your ankle restraints.

Completely free, you remain collapsed over the table, completely spent from your barrage of orgasms and sexual experience. He pulls your torso off the table, but not to stand you upright; rather, he simply removes your oversized male T-shirt, leaving you completely nude, then flips you around and lays you down over the table, drinking in the sight of your soft, white breasts.

After a minute, Dr. Klein pulls out his phone and takes a picture of you. Then, pocketing his phone, he begins walking toward the door. He turns back to you.

"I'm leaving you here, and I'm taking these clothes with me, so you don't get any ideas. You're stuck in here. Even if you could get through the door, trust me, your life will be much better if you stay here. There's plenty of toys to keep yourself occupied; I'll be back tomorrow morning to use you again. If you try to escape, believe me, I'll know, and I'll find you."