Footage and photos of Koon abusing children were on a cellphone

Koon, 27, was arrested in 2013 while Osborne was on probation on previous child pornography charges

Heather Koon pled guilty to four counts of rape Thursday in Elyria, Ohio

A former day care employee has admitted to raping four children while at work to obey the orders of her fiance, a convicted sex offender.

Heather Koon, 27, pleaded guilty to four counts of rape Thursday in Elyria, Ohio, according to the Chronicle-Telegram.

Her fiance James Osborne, 37, who is currently serving an eight-year prison sentence on previous child pornography charges, also pleased guilty in this case.

Koon raped four children while working at the ABC Kidz Child Care center in Elyria in March and April 2013.

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Day care worker Heather Koon (pictured), 27, pleaded guilty Thursday to raping four children Thursday at ABC Kidz Child Care in Elyria, Ohio

Koon (pictured in court last week) has admitted to four counts of rape, kidnapping and pandering obscenity involving a minor as well as three counts of illegal use of a minor in nudity-oriented material

Osborne (pictured in court last week) pleaded guilty to four counts of complicity to rape, complicity to kidnapping and pandering obscenity involving a minor

Police arrested Koon in September 2013 at her home in Elyria, where Osborne lived while on probation on an earlier child pornography case.

He pleaded guilty in 2010 to having sexually explicit photos of children on a computer he took to a repair shop in 2007, the Chronicle-Telegram reported.

Officers seized a phone and a laptop at Koon's home in 2013 and on the phone found footage and pictures of her abusing children at the day care center.

Osborne told her what he wanted her to do to the children using his own phone, prosecutors have said.

Koon's fiance Jason Osborne (pictured with her in a Facebook shot), 37, who is currently serving an eight-year prison sentence on previous child pornography charges, also pleased guilty in this case

Osborne (left) would tell Koon (right) what he wanted her to do to the children, prosecutors have said. Officers arrested Koon after finding footage and photos of the abuse on a laptop and on a cellphone

Koon worked at ABC Kidz Child Care in Elyria for seven months until March 2013 and later took a position at Country Day School in Amherst.

She is accused of raping four children at ABC Kidz Child Care and taking explicit photos of children in both locations, the Chronicle-Telegram wrote.

Koon pleaded guilty Thursday to four counts of rape, kidnapping and pandering obscenity involving a minor.

She also admitted to three counts of illegal use of a minor in nudity-oriented material, one count of tampering with evidence and one count of engaging in a pattern of corrupt activity.

Meanwhile Osborne, who is serving an eight-year prison sentence in the earlier child pornography case, pleaded guilty to four counts of complicity to rape, complicity to kidnapping and pandering obscenity involving a minor.

He also admitted to engaging in a pattern of corrupt activity, failure to register as a sex offender and three counts of illegal use of a minor in nudity-oriented material.

Koon abused six children in the case, according to prosecutors.

Her attorney said Thursday Koon felt 'compelled' to abuse the children but had 'a lot of remorse' for what she did.

The mother of a girl who was three years old when Koon took explicit pictures of her said: 'She doesn't trust adults at all.'

A father, whose daughter was two when Koon abused her, told the Chronicle-Telegram: 'Hopefully they get nothing less than life. 'I never realized creatures like this exist.'

Koon and Osborne face up to 15 years to life in prison, and could be sentenced to life without parole if a judge finds them to be sexually violent predators, which in Ohio means people who have committed a sexually violent offense and are deemed likely to commit more offenses in the future.