A Polk County sheriff's deputy filmed herself strapping naked children to a desk and spanking them with sex toys, then sent the videos to a boyfriend she met on a fetish website, investigators said.

On Thursday, 45-year-old Robin Leigh Pagoria was charged with aggravated child abuse, production of child pornography, promotion of child pornography and possession of child pornography.

According to an arrest report, the two children, described only as girls between the ages of 10 and 18, described in graphic detail multiple spanking sessions.

Investigators say Pagoria cut the legs off one end of the desk she used for the spanking. To keep the girls from moving, she handcuffed their arms and tied their ankles to the desk, deputies said.

The girls told investigators that Pagoria beat them with a leather sex paddle. The victims believed they were being punished — one said she was hit 50 times for being "disrespectful"

Detectives say Pagoria recorded the beatings on her cell phone, uploading them to the Internet so her online boyfriend could watch.

On Thursday, Polk County Sheriff Grady Judd called Pagoria's alleged behavior "outrageous."

"There aren't words to describe my anger with her," he said. Judd, noted for his well-publicized focus on sexual predators, said no one should be more aware of that focus that his own employees.

"She's seen us walk hundreds of them into the Polk County Jail," Judd said.

Judd said the arrest came "out of nowhere." Aside from a domestic violence incident and some minor disciplinary issues, he said Pagoria was considered a good worker.

Judd said Pagoria worked in housing at the jail, and was a 22-year veteran of the Marines. He said his office reviewed the psychological and polygraph tests from when she was hired, and they were clear.

"We do extensive background investigations on anyone we hire," Judd said.

When interviewed by investigators, reports state that Pagoria explained that she used to spank the girls, but "the spankings had not improved their behavior."

She switched to the table and handcuffs after "she decided she needed to do something that would embarrass them so they would learn not to break the rules again," the report states.

Investigators say Pagoria claimed she videotaped the sessions so she could review and "'fine tune' her technique" — leading her to modify the table, and to put a delay between blows for "maximum burn."

After the whippings, Pagoria explained that the girls were forced to stand naked in the corner "so that they could reflect on what they had done wrong," according to the report.

Deputies say Pagoria later admitted to having a lifelong spanking fetish, and to meeting her boyfriend on SpankFinders.com. Officials said the boyfriend, who lives in another state, is also under investigation.

Investigators said they found evidence of two videos on Pagoria's phone. In both, deputies said the victims' genitals and buttocks were the clear "focal point."

According to the Sheriff's Office, the videos were about 10 minutes long, and showed the children suffered "substantial" wounds. They could be heard screaming in the videos, investigators said.

The victims names were redacted from arresting documents, it's not clear how or why Pagoria had access to them. However, officials said it was not through her employment with the Sheriff's Office.

Officials said Pagoria, a deputy for nearly six years, resigned Tuesday, in lieu of being fired.