"Please, shut the fuck up" Well, I'm glad you said it first. This dialogue is terrible.
Wait a minute... She runs into some other guy who looks EXACTLY like her teacher, but the punchline ISN'T that she accidentally fucked the teacher's twin brother, and she ends up failing the test because her shenanigans in no way altered its outcome? So then what was the point of her even running into this guy in the FIRST place?