After multiple years of a groomed relationship, the teen ended the relationship when she got to university as she realised "it wasn't right".
Now, according to the Sun, the teen came has come forward about her abusive situation, which happened 15 years ago, because of the #MeToo movement.
"I adored her, I idolised her. She made me feel special because I thought she had chosen me," she told jurors.
"She was there to help us all through it," she said, breaking down.
"I viewed her at that time like a big sister."
When the teacher was arrested, she admitted the pair had been in a sexual relationship but insisted it had not begun until she was 18.