Mr. Clark tries to talk Mandy out of her decision, attempting to steer her towards other options such as becoming a nurse. However, he is unable to convince her. He says that her choice is completely unacceptable, but Mandy suspects that he is being a hypocrite and might have more familiarity with sex workers than he's letting on. Still, Mr. Clark remains firm, explaining that because of school regulations, he has to sign a document stating what career choice he discussed with her. There is no way he can approve of her choice, so he will not be signing the document, and in fact he'll have to report her to the principal.
Mandy is upset that Mr. Clark is not helping her even though that's supposed to be his job, and she thinks that the school's old-fashioned rules do not have her best interests at heart. She is determined to do whatever it takes to make sure Mr. Clark signs that document..