Sissy was no ordinary schoolgirl. She had lost her virginity young and had a very high sex drive. She was blonde and had the largest breasts in the school. On her slim frame they looked even bigger and she knew how to use them to her advantage. She always had a queue of boys willing to do her homework for her and she only had to show some of them a nipple and they would do a weeks work for her.

She had just turned 18 and she knew that now she was legal she could really start turning things up a notch. It was important for her to pass her exams and she was not that clever and so she would need to start working her magic on the teachers. They normally remained professional and did not let her looks sway their judgement but there were a few that she had seen looking at her a little lustfully and those were the ones that she would work on.

The Maths master was her first target. She needed a good grade in mathematics and she knew that he could be helpful here. She had just handed in some coursework and she knew that it was not good enough but she needed him to make sure that it was. She had seen him looking at her in class, quickly drawing his eyes away from her, not wanting to get caught and sometimes even blushing. He was a fairly young man, slim built and fair and she thought that she could easily manipulate him.

She hatched a plan where she went to his office after school to ask for some help on a specific maths problem and hoped that things would progress from there. He shared an office but she found out that the person he shared with was teaching extra curricular rugby on Wednesdays so she knew that this would have to be the day that she visited.

She thought it would be too obvious if she undid her blouse or shortened her skirt so she went along just as she normally was. Once she was inside his office she closed the door behind her and perched on the edge of his desk, crossing her long smooth legs towards him and explained that she needed some help with the topic they had been learning about that morning. As he moved towards her she reached out her hand and stroked his cock, surprised to feel that it was already stiffening in his trousers. She wasted no time in unbuttoning the front of her blouse and pushing her breasts into his surprised face. She pushed his head into her breasts and held it there strongly while she rubbed her body on his growing cock.

She then moved away, and slid her knickers down seductively and licked her fingers. She erotically dipped them in and out of her moistening pussy and watched a full erection appear in his trousers. She sat down in his chair, lifting her skirt and parting her legs so that he could see her hole and beckoned him over. He came close and she unzipped his trousers, pulling out his cock and stroking it with her nimble fingers. She took the end of it into her mouth, licking the top and then sucking it, rolling her tongue around it. It swelled even more and she was sure that she had never had a cock this big and her pussy leaked more juices at the thought of it being inside her.

This was all too much for him, having a young school girl, in her school uniform no less, tease him to an erection. He grabbed her and lifted her up, pulling her close to him and spearing her with his cock. She squealed as his meaty length filled her empty pussy and she had never felt so stretched before. He started bouncing her up and down and she felt like a small doll, his strength so much greater than hers. She was soon coming hard on his hard cock, her little pussy trying to squeeze down on him but he was too big and hard for her to do it.

He was bouncing her slower now, her weight was getting too much for him. He put her down and push to her knees waving his cock in her face so that she could lick off her sticky juices. She obliged and cleaned it off and then took it as deep as she could into her mouth. She could not manage much of his long length so he withdrew form her mouth and put her on to her hands and knees. He lifted her school skirt and revealed her tight ass. He smacked it a few times with his hard cock before entering her from behind, pounding and pounding until he was ready to come. He pulled out and shot his load all over her ass and then rubbed it in with his cock. She turned to look at him, grinning and knew that this must be the right moment to ask for help with her grades.