PASCO COUNTY, Fla. — A 25-year-old secretary at a Port Richey middle school sent a video of herself performing a lewd act to a 14-year-old boy, Pasco County deputies say.

Heather Matheison, 25, of Hudson, was arrested Friday and has been charged with electronic transmission of harmful materials to a minor. Matheison is a secretary at Chasco Middle School.

According to an arrest affidavit, a deputy was called to the school and made contact with the boy's mother, who showed them a video her son received. The video reportedly shows Matheison wearing a shirt but no pants. The deputy in the affidavit said the video shows Matheison performing a lewd act on herself.

The boy's mother told investigators that the woman sent her son the video via mobile app Snapchat. It was deleted, but the boy reportedly saved the video and sent it to his mother via Facebook Messenger.

Investigators said Matheison told them she did know how old the boy was when she sent the video.

On Friday, Chasco Middle School Principal Brandon Bracciale sent the following message to parents regarding Matheison's arrest:

This is extremely troubling to all of us as a staff. The minor victim is not a current Chasco Middle student, but that does not make her actions any less despicable. 

We put trust in our staff to keep students safe, and when that trust is violated it is shameful. We are not aware of any other victims, but if you or your student have concerns, please notify me or the Pasco Sheriff's Office.

My number one priority is your child's safety, and neither I nor the Pasco district will tolerate any employee who puts their safety in jeopardy. Thank you.