EASTON, Pa. – A Pennsylvania substitute teacher and church leader faces seven years in prison after she was bused having sex with a student in a local historic cemetery.

Kelly Aldinger, 49, was busted by police in the act around 1:06 p.m. May 6 in a cemetery off North Seventh Street. Aldinger, a former council president with St. Paul’s III Lutheran Church, was working for Source 4 Teachers as a substitute at Easton Area High School when the incident occurred, LehighValleyLive.com reports.

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“The 17-year-old was at one point taught by Aldinger, police said. The sexual relationship between Aldinger and the student began in 2015, though they initially met when the teen was in middle school, according to court documents” cited by the news site.

The Allentown Morning Call reports officer Joseph Arrendondo came across the two in the cemetery and testified that he witnessed the teacher having sex with her student. They both told Arrendondo they had been engaged in a sexual relationship since last fall, when the student was a 16 years old sophomore.

After Aldinger’s arrest, cemetery superintendent Jeff Mutchler said he planned to install security cameras at the site to prevent future tomfoolery, and Source 4 Teachers announced she was “indefinitely suspended” from working at any school, the Call reports.

On Thursday, the married former teacher pleaded guilty to one count of institutional sexual assault, a third-degree felony that carries a potential seven year prison sentence and requirement to register as a sex offender for a quarter century, according to LehighValleyLive.

Aldinger spoke in a whisper when entered her guilty plea before Northampton County Senior Judge Leonard Zito, and refused to discuss her predicament with reporters at the court house. Aldinger was released from jail months ago on 10 percent of a $50,000 bail, which her father paid.

Aldinger’s attorney, Phil Lauer, told the news site Aldinger is expected to testify on her own behalf at her sentencing hearing in early December.

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Assistant District Attorney Anthony Casola told The Call sentencing guidelines suggest a prison term of between three and 12 months for Aldinger’s situation and background.

Superintendent John Rienhart discussed Aldinger’s arrest with The Call in May.

“The circumstances are obviously very disturbing and upsetting to all of us because we have to be able to trust these individuals who work with us to use their best moral and ethical judgement when working with children,” he said.

Locals who commented online were equally upset.

“This is just gross. A cemetery?” Veronica Mars wrote. “Good God.”

“Another quality educator,” commenter Kickback added.

“Eww. At least the teachers are sometimes hot,” bethlehem35 wrote. “What’s the matter with this kid – she is a dog.”