A man accused of pushing his fiancee to her death from the balcony of a Sydney high rise sent her text messages pleading with her not to look at other men, a court has heard.
Simon Gittany is on trial in the NSW Supreme Court accused of murdering Lisa Harnum on the morning of July 30, 2011 after she tried to leave him.
Senior Crown prosecutor Mark Tedeschi, QC, read a text Mr Gittany sent to Ms Harnum when she was holidaying in Canada in 2010.
"Please don’t let any guy talk to you or please don't look at any guy as your eyes should only gaze on me, the one," it said.
In response, Mr Gittany told the court: "I was being cute."
Another text Mr Gittany wrote said: "Who the f--- do you think you are walking around the house like you own it or coming and going without my permission?... You walk around like a peacock with your hair out."
The accused said the pair had been arguing for two days at the time the text was sent.
"I was angry and I shouldn’t have sent that message," he said.
Earlier, Ms Harnum's mother left the packed courtroom as Mr Gittany demonstrated how he tried to reach out and save his fiancee.
Joan Harnum walked out before Mr Gittany, 40, jumped up on a bench.
She was seated less than a metre away from Mr Gittany and was excused when he left the witness box to demonstrate his actions.
He showed the court that he balanced on a railing, with both arms outstretched and palms down as he tried to save Ms Harnum.
He told the court one of his legs was resting on the handle grip of a treadmill as he tried to reach out to Ms Harnum, 30, who was on the awning of their 15th-floor unit.
Mr Tedeschi opened the prosecution's case by asking Mr Gittany if he had committed a "serious act of aggression" by dragging Ms Harnum back into their unit on the morning of her death.
"Yes, I agree," Mr Gittany said.
Mr Tedeschi asked Mr Gittany what had happened in the 69 seconds between Ms Harnum being pulled back into unit 1503 and the time she fell to her death.
"I suggest that you threw her off the balcony while she was still wearing the handbag she had been wearing in the hallway [when she had tried to leave]?" Mr Tedeschi said.
"No," Mr Gittany said.
Mr Tedeschi suggested the accused was "berserk" with rage when he discovered his fiancee had made plans to leave him and had given clothes to her personal trainer Lisa Brown.
"I was angry, yes," Mr Gittany agreed.
He told the court he was "humiliated" and "embarrassed" that she had involved the help of two outsiders to help her leave.
The accused agreed Ms Harnum had threatened to leave him several times before.
"I want to suggest that this time was different," Mr Tedeschi said.
The trial continues.