BROOKSVILLE — A cafeteria worker at Hernando Christian Academy has been arrested after investigators say her "sexting-type relationship" turned physical with a teen at the school last year.

According to an arrest affidavit from the Hernando County Sheriff's Office, Aimee Chevalier, 40, exchanged about 100 sexually explicit text messages — including pictures and videos of her nude body — with the teen before they agreed to meet in the school's kitchen. Once there, the pair engaged in multiple sexual activities, the Sheriff's Office said.

Chevalier was arrested Aug. 8 on charges of unlawful sexual activity with a minor and transmission of harmful material to a minor, records show.

During an interview with investigators, she admitted to the relationship — noting that she was aware of the boy's age and that her actions were wrong — and gave detailed descriptions of their sexual interactions. She also told them she made plans to have sex with the teen during an open house party at one of his friends' homes when the parents of the friend were away, according to the report.

Court records show this isn't Chevalier's first arrest. In 2007, she was charged with organized fraud of less than $20,000 and petty theft of less than $100. In both 2008 and 2009, she was the defendant in domestic violence cases.

Her arrest comes less than three months after that of 68-year-old Bruce McAllister, the husband of the school's former principal, Cathy McAllister, both of whom have since left the school. The school did not return repeated calls from the Times seeking comment, and it is unclear whether the former principal resigned or was fired before the school's new leader, Anthony Bryan, took her place.

The school's attorney, Matt Foreman, said in a statement: "HCA is committed to helping ensure a proper resolution in these matters and doing so in line with the strong values that have shaped the school since its founding in 1981. Given the ongoing nature of the investigation of these matters, it would be inappropriate to comment further at this time."

According to the State Attorney's Office, Bruce McAllister faces 32 charges for assaulting three teenage foreign exchange students who were under his guardianship. Brooksville police said McAllister, 68, a volunteer at the school who was boarding the teens, told them he was an expert in sports medicine and gained their trust by promising to make them American football stars.

"The cases are proceeding through the court," said Assistant State Attorney Erin Daly, who is handling both McAllister's and Chevalier's cases. She said her office plans to prosecute both of them to the "full extent of the law."

"When these things happen in schools, it is very unfortunate," Daly said. "We will do everything we can to go forward in making sure these actions are reprimanded."

Brooksville police Chief George Turner said his department is still investigating the McAllister case and that the school is being cooperative. He offered no further comment.

Contact Megan Reeves at mreeves@tampabay.com. Follow @mareevs.