The woman was identified by her stage name, Samantha Ardente, in reports that said the single mother of two was first approached by a high school student who "outed" her by asking for her autograph last month, Postmedia News reported.
She told her lawyer the boy demanded oral sex from her to keep quiet about her other job, but she told him to go away.
The 14-year-old boy created a Facebook page under her stage name complete with a photo of her in underwear.
The school fired her last week after nine years on the job for actions it deemed "inappropriate, unacceptable and incompatible" with its values. It also suspended the student for creating the Facebook page, the report said.
Quebec provincial police said there is no cause for a criminal investigation.