Married teacher, 32, is accused of raping boy, 11, on her bed after sending him nude photos and $700 before she was 'caught in cops sting telling him she couldn't get pregnant if they had sex again'

A married schoolteacher is accused of grooming an 11-year-old boy with nude photos and $700 until they had sex on her bed.

Ashley Elizabeth Bardfield, 32, was arrested on Wednesday night in Mt Zion, Illinois, after the boy helped police with a sting operation.

The sixth-grade substitute teacher at Decatur Public Schools District was recorded telling the boy they could 'do it again' and she couldn't get pregnant.

Bardfield was reported to police after the boy's mother noticed him 'acting differently' after spending the night at the teacher's home on March 29-30.

She went through his phone and allegedly found texts between him and Bardfield and photos of them, including one of them 'flipping off the camera'.

The horrified mother also discovered the teacher had allegedly sent her student about $700 over several months.

'[She] confronted her child about this situation and the child disclosed he had unprotected sexual intercourse with Alley Bardfield on the night of March 29,' an arrest affidavit by Mt Zion Police read.

The mother took him to HSHS St John's Hospital where staff administered a rape kit.

Detectives interviewed the boy on Wednesday morning and he told them Bardfield took her to his bedroom where they kissed and she took off both their clothes.

They then had sex on her bed, which she usually shares with her husband Casey Newton Bardfield, a construction worker. 

The affidavit did not explain why the boy was staying over at his teacher's house while her family was away. 

The boy also told police he and Bardfield allegedly exchanged nude photos on Snapchat, the affidavit stated.

Police devised a plan with the boy and his mother to get Bardfield to incriminate herself in text messages and recorded calls with him.

The boy sent her a message telling her he was going out of town, but hoped to see her again when he came back.

'I love you and I miss you, Alley. When I come back I'll see if I can come over,' he wrote.

Bardfield allegedly replied: 'You're always welcome. I love and miss you too.' 

Police obtained a court order for a wiretap and had the boy call Bardfield later that day, when she told him 'her tubes are tied and that she cannot get pregnant'.

'The victim asked Alley if he came over this weekend… if they could "do it again". Alley responded "Yes",' the affidavit continued.

Police arrested Bardfield hours later and she allegedly admitted to the crime but claimed the boy 'made sexual advances toward her'.

Detectives also did 'a thorough review of text messages, social media, and a search warrant executed at the suspect's residence'.

Bardfield was charged with grooming, and predatory criminal sexual assault of a child under 13.

She faced Macon County Circuit Court on Thursday where she only spoke to confirm she understood, and was told she faced six to 60 years' jail if convicted.

The teacher would also have to register as a sex offender for life.

She did not apply for bail and will stay behind bars until her next court appearance on April 17.

Bardfield and her husband are diehard Chicago Cubs fans, even naming two of their four children after Cubs players or related things.

The boy's family planned to sue the school district for failing to properly train and supervise staff to ensure the safety and well-being of its students.

'Ms Bardfield's actions have had a profound and lasting impact on our client, which will likely lead to significant physical, emotional, and psychological challenges,' their lawyers said in a statement.

'As a result, we will be pursuing justice not only against Ms Bardfield but also the school district as a whole.'

Bardfield was a long-term substitute teacher for the school district, including DPS District 61 where the alleged victim studied.

The Decatur Public Schools District said she was no longer employed.

'While none of the alleged conduct occurred at a DPS school, student safety is always our top priority. We are working with Mt. Zion Police and providing support to students and staff,' it said.