Help finding a story – College student fucked over the profs grade book?

Please help me find this story.

Im not sure if I read it on here or Literotica, but its about this male professor and his female student. The student is very attracted to the professor and is already doing well in his course, but she still has sex with him.

The only specific thing I can remember is at one point in the story right before she cums she opens his grade book and sees her grade is the highest in the class and that pushes her over and makes her cum

Any help is very appreciated!

Source: reddit.com/r/eroticliterature/comments/fd4xro/help_finding_a_story_college_student_fucked_over