Teacher abuses a student's mouth by promising to pass the course

This teacher abuses the mouth of a student to whom he has said that if she behaves well with him, she will have the detail of approving the course, and that way, she does not have to worry about anything. He doesn't want to fuck her, but what he does want to do is fuck her mouth and come several times in her face and mouth. In the end, when he has emptied his balls, the teacher is so bad that he tells her to open her mouth, and she starts pissing in it without the girl being able to resist.