The loved ones of those killed by Erin Patterson's deadly lunch will confront the triple murderer in court, however her estranged husband Simon is expected to be absent.

Patterson, 50, in July was found guilty of killing her estranged husband's parents Don and Gail Patterson, and Gail's sister Heather Wilkinson following a months-long trial.

In addition to the three murders, Patterson was also convicted for attempting to kill Heather's husband, Ian Wilkinson.

The four relatives of Simon Patterson, who separated from Erin Patterson in 2015, were invited to her Leongatha home on July 29, 2023, where she served a beef wellington laced with death cap mushrooms.

On Monday, Patterson will be transported from Dame Phyllis Frost Centre to face a pre-sentence hearing in Melbourne's Supreme Court.