Robyn Lindholm was found guilty of murdering her fiance George Templeton in 2005 at the hands of her "besotted" lover Wayne Amey.

"If we as a family could ask for anything, it is to know what happened to George and where his body lies," sister-in-law Deborah Teazis said in the Victorian Supreme Court.

"You have the option to do what's right...to tell us where George's body is."

They want to give the father-of-two a traditional burial so his soul could "finally be at peace".

Former exotic dancer Lindholm had told his family Mr Templeton, also known as George Teazis, had gone missing.

The "mystery" of his disappearance haunted his family and was an aggravated feature of the offending, prosecutor Ray Gibson QC said at a pre-sentence hearing on Thursday.

"There would be little scope for rehabilitation and there is a complete absence of any remorse in the killing of George Templeton," Mr Gibson told the court.

The arranged killing was premeditated and Lindholm convinced Amey to carry out the crime, he said.

During the trial jurors were told Lindholm concocted an alibi and visited a friend after she fed Templeton his last meal of a "hearty" steak so she was out of the house when he was killed.

His body has never been found but the jury heard during the seven-week trial he may have been shot at the Reservoir home the couple shared.

The victim's possibly dismembered body was likely dumped in Port Phillip Bay.

It was the first time Lindholm killed a partner, but it wasn't the last.

The 46-year-old who once worked for strip club pioneer Maxine Fensom is already in jail serving a 25-year-sentence for murder.

Eight years after she got him to kill Mr Templeton, Lindholm arranged for Wayne Amey to be killed when their relationship soured.

Lindholm was addicted to ice and living out of her car when she met Torsten Trabert.

He was motivated by "an obsessive lust" when he ambushed Amey at a car park, bashed him with a baseball bat and threw him into a car boot.

Her barrister John Kelly SC admitted the family not getting closure was an aggravating feature but argued she had been an "impeccable" prisoner.

His client was no longer on drugs, had no issues with other prisoners and had undertaken educational programs while in jail.

He urged Justice Christopher Beale not to impose a "crushing" sentence.

"I'll indicate now I won't be imposing a life sentence but I'll be imposing a significant sentence," Justice Beale told the court.

Lindholm will return to court in November for her sentence.

Australian Associated Press