Ms Patterson's relationship with in-laws probed in trial
The events after the guests left the dining table have been raked over in hours of court evidence and detailed in briefs running into tens of thousands of pages.
On Friday, lead prosecutor Nanette Rogers SC
questioned the "love" Ms Patterson has maintained she held for her in-laws:
Rogers: You agree that you told police in your record of interview that you loved Don and Gail?
Patterson: Correct.
Rogers: Surely if you had loved them .. You would have immediately notified the medical authorities that there was a possibility that the foraged mushrooms had ended up in the meal.
Patterson: Well I didn't. I had been told that … people were getting treatment for possible death cap mushroom poisoning. So that was already happening.
The prosecution noted that these questions related to Ms Patterson's mindset on the Tuesday after the lunch, days before anyone had died.
But, Dr Rogers told the court,
Erin didn't tell "a single person" that foraged mushrooms may have been in the meal.
"Correct," Ms Patterson replied.
Crown prosecutor Nanette Rogers SC has been cross-examining Erin Patterson this week. (AAP: James Ross)
Further, Dr Rogers put to Ms Patterson that she had
"two faces" when it came to her relationship with her in-laws. A public face of loving them, and a private face shared with her Facebook friends, where she shared anger and mocked her relatives' religious views.
Ms Patterson denied it, telling the court she had "a good relationship with Don and Gail" and sobbed as she recounted how she had invited Heather Wilkinson to the lunch to thank her for the kindness she had shown her over the years.
The trial's not over yet
This week in court the prosecution also alleged that in the lead-up to the lunch, Ms Patterson had seen iNaturalist listings of death cap mushrooms at nearby Loch and Outtrim, and knowingly foraged the poisonous fungi.
They alleged that photos taken from devices seized at her home showed she had been weighing dehydrated death cap mushrooms in the lead-up to the lunch, to determine what the lethal dosage would be for her guests.
Simon Patterson declined to attend the lunch at his estranged wife's home. (AAP: James Ross)
The prosecution said that her elaborate cancer lie was carefully constructed to create a pretence for a lunch without her children, and that had her estranged husband Simon attended the lunch, she would have knowingly fed him a sixth beef Wellington laced with death cap mushrooms.
And they alleged her decision to dump the dehydrator and lie to police about it was done because she knew admitting to the dehydrator would have revealed her murderous plot.
Ms Patterson denies it all. And the trial's not over yet.
The trial, which is taking place at the Latrobe Valley Law Courts in Morwell, has some way to go yet. (AAP: James Ross)
This week, Justice Christopher Beale told jurors the hearings could stretch towards the end of June, before they would be asked to deliberate and return a verdict.
How long the jury will need to weigh the mountain of evidence and arrive at a verdict is impossible to know.
"None of you can tell me how long you will be in deliberations … how long is a piece of string?" Justice Beale said.