Cheerleading coach, 43, and married mother of two Kristina Ngum arrested for having sex with one of her students

A cheerleading coach has been arrested after North Carolina police said she had sex with one of her students.

Kristina Ngum was held after the student she allegedly had sex with was arrested on an unrelated drug charge.

He is believed to have told police about their affair while being quizzed.

Her duties also include coaching the cheerleading team of the school and she also works with children with disabilities.

Ngum, 43, tued herself in at the Mecklenburg County Sheriff’s Office Saturday after Charlotte-Mecklenburg police obtained a warrant for her arrest.

Detectives determined the sexual activity happened at a location off campus.

The age of the student has not been released.

Since her arrest Mrs Ngun, who has two young boys, has been banned from teaching her classes.

'A school teacher has a sacred bond of trust with students, their parents and with our community. We take very seriously any allegation of inappropriate teacher behavior that puts children at risk and compromises that trust. CMS is working closely with law enforcement authorities in their continuing investigation of the alleged actions of Kristina Ngum.

'An inteal CMS meeting with Ms. Ngum  and CMS will determine any immediate actions the school district will take at that time. Ms. Ngum will not be in contact with students prior to the meeting.'

Her arrest stunned neighbors.

'I just can't believe something like that,' says neighbor Jesse Ravenel.

He said he knows knows Kristina, her two young sons and her husband.

'I can't say one negative thing about the family,' he said.

'She's just as sweet as she could ever be when you see her.  She's (a) very sincere looking person.  You ask her for anything and she's always there to help ya out with anything,' says Ravenel.

Ngum is charged with one count of sexual activity with a student by a teacher, a felony.

She has a previous arrest in July 2011 for larceny under $50 and false pretense, WSCOCTV.com reported.