Chris Dawson, a convicted wife killer, is on trial for allegedly having s** with a 16-year-old student over 40 years ago.

The NSW District Court heard that the former teacher and rugby league player had s** with the girl in his parents’ bed and told her “you did very well” after the encounter.

The pair also allegedly engaged in s**ual activity in the back seat of his car, in his school office, and in a pool while his brother was up the other end.

Dawson has pleaded not guilty to one count of carnal knowledge, relating to alleged s**ual activities with the teenage girl between July 1980 and December 12, 1980.

During the trial, Crown prosecutor Emma Blizard argued that s**ual activity first occurred at Dawson’s parents’ home when the girl, identified as AB, was a student in his year 11 sports class.

AB described their first interactions in the playground when she was in year 10 in 1979, through to their first s**ual activity at his parents’ Maroubra home in the second half of 1980.

The incident occurred on a Friday or Saturday night in about August or September of 1980, while Dawson’s parents were away at their holiday home.

AB testified that after the s**ual activity on his parents’ bed, Dawson asked if she was okay and said: “I hope this was helpful”, “it was a good start” and “you did really well.”

According to AB, she was told to keep it a secret.

The court also heard that AB endured a tumultuous home life at the hands of an alcoholic mother and stepfather and confided in Dawson, who had shown interest in her.

Dawson’s defence barrister, Claire Wasley, told the court that the trial should be determined on the evidence, and Judge Sarah Huggett could not consider Dawson’s murder conviction.

Wasley argued that Dawson’s ‘morality’ was not an issue in the trial either.

The defence argued that the issue at trial is the timing of the first s**ual activity, which they say occurred following AB’s 17th birthday in early 1981.

AB also testified that Dawson would buy her chocolates before they engaged in s**ual activity in the back seat of his car, and how he would move the baby seat out of the back to make room for them.

She also said that she would engage in s**ual activity with Dawson in his office at school during recess.

The Crown will also be relying on cards sent by Dawson to AB, including one at Christmas in 1980 that said: “Happy Christmas.

Once or twice every minute.

Love always.

God.”

AB told the court that the reference to ‘God’ was an attempt to disguise his name.

Dawson appeared gaunt when he appeared in the NSW District Court.

He has maintained his innocence and has lodged a notice of intention to appeal.

Last year, he was sentenced to 24 years in jail over the murder of his wife Lynette Simms.

The trial before Judge Huggett is expected to run for two weeks.