SA teacher Renee Underwood cries as she apologises for grooming high school student for sex

Renee Underwood has admitted to grooming a student she was tutoring. (ABC News)

A South Australian teacher who groomed a regional high school student she was tutoring has delivered a tearful apology to his parents in court.

Renee Underwood, 34, fronted the District Court today charged with making a child amenable to sexual activity after earlier pleading guilty to the crime.

The victim was an aspiring male medical student who was groomed between July and August last year.

The court heard Underwood received a text from an unknown number this morning saying "karma's coming dog".

She became emotional in court as she read out a letter of apology to her victim's parents.

"I am sorry for the pain in relation to what he has endured; I am sorry for the disruption to his life and the ongoing issues he may face as a result of my offending," she said.

Underwood told the court that she was a victim of sexual abuse and had lifelong trauma from it.

"I am an adult and should have known better," she said.

"I was in a very dark place in my life and how I dealt with that is inexcusable."

The victim's mother cried as the schoolteacher read out the letter.

Call for jail term for mother

Prosecutor Amy Fisher told the court the victim now suffered anxiety and trust issues as a result of the offending.

Ms Fisher asked Judge Jane Schammer for an immediate jail term for Underwood.

Judge Jane Schammer will decide Underwood's sentence. (Twitter: Courts Administration Authority)

Defence lawyer Jane Abbey said Underwood was in a dark place at the time of the offending.

"There is no overlooking the fact that we are dealing with a teacher and a pupil," Ms Abbey said.

"She crossed boundaries, she abused the trust of not only the complainant but his parents, and there really is no excuse in terms of her own life for those breaches."

The court heard Underwood had a three-year-old daughter who was now living with her father.

The defence lawyer asked the judge to extend mercy to Underwood, asking Judge Schammer to hand down the lowest possible period of incarceration.

Underwood will be sentenced next month.

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