Devil in the flesh (1998)

When her mother is killed in a mysterious house fire, rebellious teen Debbie Strand is sent to live with her grandmother, where she becomes even more unhinged. She develops an intense crush on her hunky creative writing teacher, Peter Rinaldi, but her numerous attempts at seduction end in failure. Soon Peter's friends start turning up dead, and he fears that his fiancée, Marilyn, may be Debbie's next victim.