Jack looked up at the eighteen-year-old blonde stood in front of him,
"This is just not good enough Rebecca."
She gave him the well practised "I don't care" look of teenaged girls the world over and began to inspect her nails.
"I know all you're interested in now is having a having fun, boys and looking good..." and boy did she look good... Kind of short, about 5'2" he reckoned, blonde hair just a little past her shoulders, and in that school uniform! Wow! The short navy skirt showing off her shapely, lightly tanned legs, a white blouse, unbuttoned as far as she could get away with, with just a hint of her bra showing through the material, and her school tie hung loosely around her neck hanging down over those perfect, firm, young breasts. Jack forced himself to remember what he had been saying
"... But this is a very important year for you. You need to do well. I know you're capable of it, you just need to put in the effort. Now, I've spoken to your mother and we've agreed you will be staying after school every Thursday for extra tuition with me." Her face was thunderous...
"But, sir!" "No buts... It's final" With that, Rebecca turned round and stormed out of the room. Jack watched the way her skirt swung over her firm, round arse as she walked away.
Two days later it was Thursday, Jack was waiting in his room for Rebecca to turn up. She was already 10 minutes late. He heard footsteps along the corridor, the door was flung open and in she came, slammed her bag down on the table and sat down, slumped in her chair. Jack wondered if she realised her skirt had ridden up when she slouched, and he could see the tops of her soft, smooth thighs. He struggled to tear his eyes away, and when he looked up, she was staring at him. Did she know he'd been trying to look up her skirt? He coughed...
"Right Rebecca. We better get started then..."
He explained the work to her and set her off doing a task whilst he carried on with some marking at his desk. The room was silent apart from their breathing and the sound of pens on paper, then he heard her shift in her seat. Glancing up he couldn't believe what he saw. Rebecca's skirt had ridden up further, and, as she moved her legs were slightly apart Jack had a perfect view of her black, lacy knickers. He felt his cock stiffen. He looked up at her face and she was looking back, grinning.
"It's a bit hot in here isn't it sir?" She said, taking off her tie and unbuttoning her blouse still further, just letting Jack see that her bra was a matching black lace. "I don't think I understand this question sir. Can you help me?" Taking a deep breath, he walked over and stood behind her to explain, leaning over her and looking down her top. Those breasts were just so perfect, he could imagine holding them, stroking them, sucking on them.
"Are you OK sir?" Rebecca asked, looking up at him and grinning. "Only, you look a bit..." She glanced at his crotch and licked her lips "flustered."
"Just get on with your work young lady!" said Jack, embarrassed at being caught out, and went to sit back down.
They sat in silence again as they both got on with their work. Out of the corner of his eye Jack could see Rebecca fidgeting, glancing up he saw that as she was seemingly concentrating on a question her left hand was stroking up and down the inside of her thigh, bunching her skirt up slightly and giving him a fantastic view of her soft, tanned skin against the black lace of her knickers. Jack's cock sprang to attention again and he shifted in his seat. Rebecca looked over at him, caught his eyes and deliberately licked her lips, and slowly, very slowly, ran her hand up her thigh, opening her legs a little more and slipped her fingers inside her knickers, letting out a barely audible gasp as her fingers found her swollen clit.
That was it, Jack couldn't take anymore. "You dirty little bitch..." He grabbed her out of her seat and pushed her on the table, his hands groping at her, his mouth on hers, ripping open her school blouse.
"Sir, stop it! Stop it!" She pushed him off her looking shocked. "What are you doing?"
"You come in here and show me your knickers and bra, flirting with me, playing with yourself and now you ask what I'm doing? I'm going to give you a damn good fucking that's what I'm doing!"
"Please sir, I was only messing around, trying to wind you up. Please don't hurt me, I've... I've never had sex before."