"Miss Callahan,, see me after class."

She froze at Mr. David's words. Snickers could be heard around the room. Mr. David was known throughout the school as a hard-ass. That was the worst part about going to a private school; anything was allowed.

As the bell rang, she stood patiently by her desk, with her head bowed. He didn't look up at her until the hall had emptied, the students all leaving for the dining hall. She hoped she wasn't going to miss dinner. When he finally stood up, it was to lock the door and shut the blinds. Lisa gulped; surely this wasn't a good sign. He walked around his desk, sitting on the edge.

"Miss Callahan, you realize that you've failed the last three test in my class, correct?"

Lisa shrugged, "I'm sorry, sir."

"You don't seem to realize the implications of this, you are failing my class and with the remaining assignments left in the semester, there is no way that you can pass."

"What?! That means I won't graduate!"

"Exactly, now you are starting to understand."

"There has to be something I can do to pass! Please, I'll do anything!"

"Well, Miss Callahan, you know I do not offer extra credit." He stood up, walking closer to her, "But we might be able to work something out."

"Anything!"

He pulled out a chair, sitting in front of her. "Take off your uniform."

"What?"

"You heard me Miss Callahan, if you want to pass my class, you will do what I say."

"But..."

"I'm not a patient man, Miss Callahan, and I'm not a stupid one either. I know your reputation around this school very well."

Lisa sighed, bowing her head in embarrassment as she toed of her shoes and leaned down to pull off her stocking. Slowly she unbuttoned her blouse, letting it hang open as she slipped her skirt down her thighs. She handed both garments over at Mr. David's out stretched hand. He threw them onto his desk, far out of her range. She stood before him in a lacy white bra and a barely-there thong with her arms crossed in an attempt to cover her breasts.

"Now come closer. Let me look at you."

She stumbled forward, standing between his spread thighs. He pulled her arms away from her chest, running his fingers over the curves of her breasts and down her flat stomach before turning her around, grabbing a handful of her pert ass and squeezing until she yelped.

Letting go she relaxed only to let out a small cry as his hand landed heavily on one uncovered cheek.

"You've been a very bad girl, haven't you?"

When she didn't answer he smacked her ass again. "You will answer me when I speak to you and you will address me with the proper respect. Do you understand?"

"Yes sir."

"Good, now you've been a bad girl, haven't you."

"Yes, sir."

"Say it."

"I've been a bad girl, sir."

"You understand that you need to be punished, yes?"

"Yes, sir."

"Then remove your undergarments and get on your hands and knees,"

She did as ordered, leaving herself spread and vulnerable before him. If he'd had any second thought about what he planned, they were dashed by the wetness he noticed between her thighs. With a growl he pushed the chair back and knelt behind her, beginning to smack her ass quickly, leaving red prints where his palm landed. With each smack her cries grew louder and her body jerked in an attempt to get away, but her pussy was dripping now and that was all he needed for confirmation that she loved everything he was doing.

With a rough shove, he pushed her chest to the ground, leaving her ass in the air. Pulling her arms behind her back, he tied her wrists together with his tie. He shoved into her without warning and the moan she let out echoed throughout the room.

"Quiet now, don't want anyone to come looking now do we?"

"No, no." She cried out, thrusting her ass back as well as she could without leverage. "Please don't stop."

Grabbing a handful of her hair he pulled her up to her knees, kissing her roughly. As suddenly as he'd kissed her, he pulled back, stuffing her panties in her mouth and pushing her back down. With a hand in the middle of her back to brace her, he fucked into her hard, her moans muffled through the lace so the loudest sound was skin slapping against skin.

She came with a muffled scream, clenching around his cock and milking him to orgasm. He trust a few more time, pumping her full of his seed. More gently than he'd been so far, he pulled out and untied her wrists. She spat out her panties as he pulled her into his arms, holding her as they both sought to catch their breath.

"You definitely deserve to pass my class now."

"I don't care as long as we get to do this again."