Morra was investigated by police after a CBC News investigation earlier this year.
She used the online name 'lilsecrett.'
The 22-year-old appeared in provincial court in Windsor today wearing a black blouse and black tights.
Judge Greg Campbell told Morra to, "have some self-respect for yourself, respect for others and respect for your community."
Campbell described what Morra was doing as a "widely offensive act," adding that her behaviour "isn't acceptable."
He stated in court that her goal was to "make more money."
Morra made $1,500 from one of her live webcam performances in the library.
When Morra was asked if she had anything to add, she responded, "That's OK."
Defence lawyer Pat Ducharme told the court it is clear Morra was facing a desk while in the library and what she did was only for the camera in front of her. He said no one else could see anything inappropriate, and her actions did not offend anyone in the library at the time.
Ducharme told the judge that Morra's parents are not happy, and that she's embarrassed knowing people are aware of the work she was doing.
He also said Morra is sorry and that she is done with the online sex show business.
A joint submission suggested she be fined $250 followed by a 12-month probation period.