serve her as her toy

"maybe if you come here every day after class and make me happy i can help you with your notes... during whole the ingeneering"
you're about to protest, you don't need favours to pass your exams but she makes a sin to shut up
"if not, you can forget about passing an exam in this university in whole your life"
embarrassed about having to accept this you nod
"all right i'll do it... what will i have to do?"
smiling she answers you "easy: being my secretary... and my sex toy"
you blush "yo-yo-your sex toy?"
"yes, it doesn't matter when or where you are, if i ever have the need of some sex you'll come to me and you'll fuck me"
your cock is rock hard in your pants and it's clearly noticeable
"i guess that's an agreement... now get naked so i can try my toy"