A teacher charged with raping a 15-year-old student appeared to blame the victim for the unlawful relationship, saying his constant flattery and affection towards her led to them having sex, standing up, in her classroom.

Jennifer Caswell, formerly known by her married name Jennifer Sexton, is facing prison for the second-degree rape of the eighth-grade boy in Oklahoma, along with other charges.

In her first-ever interview, set to be aired on Tuesday, the 29-year-old suggested it was the boy's persistence that led to them having sex in her classroom last April.

She told Dr Phil: 'He came in, I was working on things, he kept coming closer to me and I would kind of walk away to the other part, you know another room, another areas of the classroom and he just walked up to me and then he kissed me. And then it just kind of went from there.'

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Jennifer Caswell, a former teacher accused of having sex with a 15-year-old boy at the middle school where she taught in Oklahoma, appeared to blame the victim in a recent interview (pictured), saying it was his flirting and affection that led to them having sex

Jennifer Caswell, the teacher charged with the second-degree rape of a 15-year-old male student, claimed the teen pursued her in the classroom which led to them having sex

Caswell said that during the two hours that the eighth-grade student was in her classroom at Hollis Middle School, their illicit encounter lasted 15 minutes and that they kept their clothes on.

'I was walking around the classroom straightening up the desks and he came and I guess it was standing up,' Caswell said.

The 29-year-old admitted that she did not tell the student to stop what he was doing.

I'm not a sex offender. I'm not a threat or a danger to anyone... But I didn't force anything. I'm not a rapist. Jennifer Caswell, ex-teacher charged with the rape of a student

She said: 'I kept on saying, ''No you know we can’t do this. No, no, no.''

'He wasn't forcing me, I mean, I couldn't easily just walked out of my classroom, but I didn't.

'But I was resisting because I knew it was wrong, but I didn't.'

Caswell said that following sex with the student, she felt 'terrified'.

'I just couldn't believe I had done something like that,' she added.

The sexual encounter took place within six weeks of Caswell having her teaching certificate.

She was arrested two months later and faces jail along with being placed on the sex offenders' list for the rest of her life.

Caswell said: 'It's horrible because that's for life. I’m gonna be a sex offender forever. And I'm not, I'm not - I'm not a predator.

'I'm not a sex offender. I'm not a threat or a danger to anyone. It's here forever and I'm gonna pay for it forever... But I didn't force anything. I'm not a rapist.'

However, the teacher admitted that prior to having sex in her classroom, she had kissed the student while spending time at his home.

Caswell claimed her failing marriage with her now ex-husband, as well as the culture in her small town, all contributed to the unlawful relationship.

She said: 'I felt very unwanted by my husband. I was with him for ten years and I was never complimented. We never held hands or were physical.'

Caswell, pictured left, was married when she began having illegal sexual encounters with a teenage student. Right, she is pictured in her mugshot in 2014

The former English teacher said she was flattered and came to enjoy the attention, flirting and compliments she received from the student.

She told Dr Phil: 'He was very flirty and I should have put a stop to it and I didn't. I wasn't used to the attention.'

In another startling admission, Caswell also explained how she followed the young boy 650 miles to Mississippi on his family vacation last June for another secret tryst.

The teacher abruptly resigned from her job in April 2014 amid suspicions in the community that something inappropriate was going on between her and the student.

Bizarrely, Caswell told Dr Phil that the boy and his father, a pastor, apologized to her for the fact she had lost her job.

She would visit the father and son at their home, spend time talking with them in the living room and watching movies.

However Caswell said that she believed the father was unaware that she had had sex with his son.

The former teacher was arrested at a Best Western Hotel in Olive Branch, Mississippi after police caught her and the boy in a room together.

The victim, who has not been named, also told police they had sex in the teacher's classroom for the first time just days before she resigned.

They also allegedly had sex in her SUV and at her home.

Caswell faces three counts of second-degree rape, two counts of enticing a child, and one count of forcible sodomy.