Teacher is female young with a short blonde bob of hair
She has the outdated trope of a “black best friend“ who is maybe school counsellor or headteacher
The main teacher maybe was in an abusive teenage relationship and had children very young
Dad not in the picture
Her daughter is kidnapped and presumed dead
Before the disappearance of her daughter she used to tell a very specific and fantasy/horror “family story?” that was passed on and was personal, helps her keep the memory of the daughter alive
It was secret so rightly the main teacher thinks that only she knows
A troubled teenage girl ends up in her creative writing class
This girl is asked to share a story with the class to boost confidence.
She comes up with (surprise surprise) the story, the teacher gets mad, asks is this a sick joke, is disappointed because she built up a trusting bond with this student and now thinks she has broken into her house and looked through her therapy papers or diary or personal notes. Later on finds out the only way this girl could know is if it was her own daughter which of course it is.