The victim was being punished for cheating on her with his ex-girlfriend

A 22-year-old woman, who was given permission by her boyfriend to burn his penis with a hair straightener after he cheated on her, has received a suspended jail sentence.

The mutual agreement between the couple from Mount Barker, west of Adelaide in South Australia, saw the jealous girlfriend give her partner third-degree burns after he spent two nights with his ex-girlfriend.

Applying the straightener for just a few seconds, Bronwyn Joy Parker told the police she thought it would only feel like sunburn, NT News reported.

Bronwyn Joy Parker,22, pleaded guilty to burning her boyfriends penis with a hair straightener after he spent two days with his ex-girlfriend

Ms Parker pleaded guilty to the incident which occurred in December 2013 and received a suspended nine-month jail sentence upon entering an 18-month good behaviour bond.

During the sentencing District Court Judge Paul Muscat struggled to comprehend the matter of the court case saying it was an unusual situation.

'In short, his penis will be scarred for life and he will suffer from a number of issues, including the proper function of his penis, not to mention the cosmetic and psychological problems associated with the scarring to such a sensitive site,' Judge Muscat said.

Ms Parker met her victim on Facebook and as the relationship developed it turned turbulent.

Ms Parker thought it will only feel like a sunburn. After pleading guilty she was given a suspended nine month jail sentence upon entering an 18-month good behaviour bond

The judge recognised the jealous nature of Ms Parker and the troubled relationship, which saw her initially planning to burn her boyfriend's testicles.

'You regularly abused him, including physically, if you suspected, or, if he admitted to being unfaithful to you. You were particularly jealous of his association with his ex-girlfriend,' he said.

Interviewed by police after the incident took place, Ms Parker said she was not aware of the damage she would cause.

'To start off with, it looked brown around the outside and it didn't look too bad, it just looked as if you had cooked a piece of meat,' she told police.