"Miss Efferson, I am sorry to say you did not pass this exam." Molly began to cry. "However, I can offer you extra credit. If you refuse at any point, you will lose points on the exam. If you ever tell anyone, I will use my power to have you expelled. Do I make myself clear?"
His voice was harsh and scary. "Y-yes sir." Molly said slowly.
"Good. Take off that shirt."
Molly froze. "Excuse me?"
"What is 56 minus 10, Miss Efferson?"
"46..." She said slowly.
"This is now your grade. Take off the shirt." Molly grabbed the bottom of her shirt and lifted it off her head, revealing a black satin bra underneath. Dr. Morgan stepped forward, grabbing her tits. With one hand, he reached behind and unhooked the bra as he forced a kiss on her lips. She struggled a little as his tongue found a way into her mouth. He swirled it around for a moment before breaking off. He moved to her chest, sucking one nipple as his fingers pinched and twisted the other one. Molly moaned loudly.
"Whatever I say you do, you do, you will be my slave until I see fit to release you." The hand that was not teasing her nipples was at his crotch, undoing his belt and releasing his rock-hard cock. "Suck it, you little tease. This is what you get for wearing little skirts."
Molly moved down and put her lips around the head, going slowly. "I know you aren't a stranger to this you whore." With that, he put his hand on the back of her head and forced his cock deeper into her mouth. She gagged a little. He held her there for a few more seconds before releasing her. "Now suck it for real." She did as she was told. She kept her eyes forward, staring at his stomach. "Look at me." She looked up with her blue eyes, still sucking. He nearly came right there, but he made himself wait.
"Stop it now. Get on my desk and stay still." He went into his closet and pulled out white rope. He bound her hands together above her head and tied her legs to the feet of the desk. His hand rubbed her crotch. "You're a wet little slut, aren't you?" She nodded. He pulled out a pair a scissors and cut her panties off. He sniffed the cotton crotch of them. Her juices were sweet. "Why doesn't my little whore have a taste of her own juices?" He stuffed the panties crotch first into her mouth. She struggled against her bindings. Her pussy was now completely revealed and to his pleasure, completely bare. His fingers slipped up and down her smooth lips, pausing at her clit to tease it. Molly moaned louder. Dr. Morgan put his mouth on one of her nipples, playing with it between his teeth. The hand not teasing her pussy was on the other tit, resuming its teasing. With a bit of laughter, he bit down on her nipple, pinched the other, and shoved two fingers into her pussy at the same time. She squirmed in pleasure. He began pumping his arm, hitting her G-spot with each movement. She was moaning through her panties. He took his mouth off her tit. "Do not cum until I say you can, or you will be punished." It was too late though, Molly's body was already shaking with orgasm as she squirted all over his arm and leg.
Dr. Morgan frowned. "What did I just say bitch?" He slapped her tits and twisted her nipples until she screamed through the gag. "Exactly. Looks like you need to learn another lesson." He grabbed his cock and positioned it at the opening to her pussy. He held onto her shoulders and pushed. She screamed again. He started to pound her, moving as fast as he could. One hand went to rub her clit. "My squirting whore, that's what I'll call you. And from now on, you will call me master or sir." Her moans were picking up. "Do not cum." He said through grit teeth. He felt his orgasm nearing. His balls clenched up and soon released.
"Now you can cum." Almost immediately, she was convulsing again, squirting all over his cock as it released cum into her pussy. He bent on top of her, pushing her out of her face. He pulled the gag from her mouth and kissed her, this time she kissed back. He undid her ties and commanded her to get on her knees. "Clean up my cock, you little slut." She nodded and took it in her mouth, sucking the cum from it, swallowing it.
He moved to the armchair in the corner of the room. "Crawl here." She did as she was told, sitting at his feet. "You are to remain my slave. Remember your rules. I want you to meet me at my home tonight at 7. Do not eat dinner, you will be going out with my wife and I. She will love you as her anniversary gift."