BETHEL PARK (KDKA) — A woman is now behind bars, accused of raping a man who is mentally challenged.

Lisa Kelly, 53, was arrested Wednesday afternoon and had no comment while on her way to the Allegheny County Jail.

“She did admit to having a relationship with the individual,” said Bethel Park Police Det. Joelle Dixon.

The victim is a 24-year-old man with an IQ of 48 and the mental capacity of a 5- to 8-year-old child.

Kelly was a job coach with the Allegheny Intermediate Unit Lifehouse during the 2013-14 school year.

The AIU released a statement which reads in part:

“When the AIU became aware of the alleged inappropriate and unprofessional communication between Ms. Kelly and the former student, the agency took swift and immediate action to investigate the matter.

While the AIU was in the process of completing its investigation, Ms. Kelly abruptly resigned on February 4, 2014.

From the time the AIU learned of the allegations up to and including the date of resignation, Ms. Kelly had no contact with any student nor access to AIU property.”

Officials say Kelly then began working at South Hills Village, as did the victim. Authorities say that is where the alleged sexual relationship began.

“The father became aware after speaking with his son because he had some concerns. He became aware of a possible relationship between the two and he confronted his son and obtained some information, and then came forward to us,” said Det. Dixon.

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Kelly told KDKA that she had no sexual relationship with the victim; however, police say she told them that she did. Police say she called it a weird friendship, and they were open friends.

According to investigators, Kelly said the two allegedly had sex in a storage room in the South Hills Village mall more than 12 times for about a year.

KDKA’s Brenda Waters: “You did not have sex with him?”

Kelly: “No.”

Kelly is charged with the rape of a man who does not have the capacity to make informed decisions about engaging in sexual interactions.