"Mr. Turner?"
A sweet voice followed the timid knock on the wooden door to his office. Just a slight tremble in her voice gave her uncertainty away, and was enough to spark his anticipation.
"Ah, Miss Darten, I have been waiting for you."
Oh hell, he had been waiting, for almost a year now, until her grades finally dropped below the acceptable level. Gradually giving her lower and lower marks, intimidating her and holding the thread of not passing the course over her head, until her trepidation did indeed affect her performance, speeding the downward spiral. The timing was perfect - the test written the day before her nineteenth birthday being the crucial one, determining whether she would, narrowly, pass the course or being forced to repeat it. Indeed, it was this very test that Christian Turner was now, after giving himself two days to examine the work of the class, going to discuss with Louisa Darten. More exactly, he was going to discuss her result and see, whether she would be willing to do something to change that result. The thought of what exactly she would need to do tightened his dress pants.
"Do come in. Would you please close the door behind you?"
Louisa Darten stepped into his view. Her ash blonde hair was swept back into a ponytail, a thick jumper almost concealed her fine pair of boobs, only her shapely ass was displayed in a tight-fitting jeans, as Christian noticed when Louisa turned around to shut the door. The thought of how it would sound to smack this juicy piece of meat only left him, when she had walked right in front of his desk and looked down to him expectantly.
"Take a seat Louisa." She obliged. "I expect you know why you are here?"
"Is it because of the test, Sir?" She looked at him, her blue eyes large with anguish.
"I'm afraid it is." With this, he shoved her work in front of her to examine, and she stared at the piece of paper which now contained almost as much red as blue ink. He stood up, walked around his desk and positioned himself behind her to look over her shoulder.
"How could this happen? I was so good and worked so hard." She barely whispered and he knew, that this moment unhinged her whole future. A single tear made its way down her cheek and he caught it with his forefinger. From behind he spoke softly into her ear.
"Maybe that was your mistake. Always being the good girl."
Oh and she was the epitome of a good girl. Not running around in slutty outfits like half of the girls her age. Always being polite to everyone and respectful to her parents and other figures of authority. Even involved in some charitable activities of her church. Having a boyfriend of long-standing, Alexander, who actually sits with her in the very math course he teaches. But ever since he observed her that day in the library he knew that under this thick outward layer, deep inside, there hid a naughty little girl.
His cock gave a jerk thinking about that day when, almost a year ago, late in the afternoon he stepped into the library and found Louisa alone in there. Being lost in a world of her own she had not noticed him - indeed she would have been ashamed if she had, because in that instant she was not only reading but her slender fingers were busy rubbing between her legs. The book must have featured some erotic scene or picture which caused her to forget the public place and stroke through her jeans the spot where her pussy must have begun to tingle. He was sure of it, he even heard a little moan falling from her lips. Only her youth had kept him and his raging hard-on from joining her then and there, but he knew that somehow, some day, he would take his erection, which he was then stroking vigorously, and ram it into this little pussy of hers, which was there a few meters from him begging for release. A honking car outside brought the girl back to reality long before reaching her point of bliss, and she startled visibly, stopped her sensual motion, blushed furiously and looked cautiously around but did not spot him.
"Maybe it is time to be a bad girl for a while." he suggested. She stared at him open-mouthed and he took the opportunity to rub his wet forefinger over her lower lip. "I think in this instant, the bad girl might be able to save your grade and help you pass the course."
She swallowed visibly and stared at him. "What do you mean?"
"Oh, don't play the little innocent miss. You have a boyfriend, don't you? I bet you have already slept with Alexander, haven't you? Or was it another one that popped your sweet little cherry?" He went on stroking her cheek.
"No, I have only ever done that with Alexander." Her timid voice matched her eyes, which were downcast.
"Now answer me truthfully. Does he satisfy you? Does his little penis make you scream for more?" The blush that crept into her face gave her answer away. Mr. Turner pressed on: "Or do you stroke yourself to your orgasm when he is already asleep or gone home?"
Barely visible, she gave a slight nod.
"And how do you do that? Do you rub that hungry little pussy with your fingers like you did last autumn in the library?" With that he laid his fingers where she had such a long time ago and moved them in soft circular motions.
"Mr. Turner, please, I don't think this is right." She spoke cautiously but did nothing to put his hands away.
"Well, it certainly is the right thing to do to save your grade." He put a little more pressure on her pussy and circled his other arm around her to caress her breast while he buried his mouth and nose in her neck to smell and nibble on her skin. "And moreover I only think it right for you to experience sex with a real man who can satisfy your needs." With that, he sunk his teeth into her neck and, oh yes, that was definitely a shiver he felt running down her spine. "Do you want to know what a real man feels like?" With that he pressed his erection into her back.
She closed her eyes in defeat and whispered: "O-okay."
He couldn't help but smirk at her soft voice and he moved his hand up to the hem of her comfortable jumper. He dragged the thick cloth over her torso, bringing up her arms in the process. The sight, that greeted him when he looked down, was one, he had waited almost a year for. Rather small breasts, barely a handful each, were encased in a pale pink soft cotton bra. It hid her tits modestly, but he just moved the cups out of the way and filled his hands, kneading and pressing them together. He caught her small nipples between his fingers and rubbed them. Impatiently, he dragged her upwards, turned her around and backed her into his desk.
"Get rid of my clothes!" he ordered in a crisp voice. He watched, fascinated, as her slightly trembling fingers opened button after button of his white shirt and pushed it down his arms. She looked up at him with a question in her eyes, he just nodded.
Louisa's hand wandered down his torso, slowly undid his belt buckle, opened the button and pushed the zipper down. Bravely, she reached out a finger and stoked his erection lightly.
"Spread your legs for me, my little one.", he commanded, pushed her thighs apart and stepped in between. His thumb rubbed her lower lip again when his grip on her throat and neck tightened a bit and pushed her upper body down onto his desk, right on top of her ruined test. She couldn't help but let out a small whimpering sound.
