The host of a weekend family lunch at her Australian country home has been charged with murdering three guests with poisonous mushrooms and attempting to murder a fourth who was left fighting for life. Police said Erin Patterson was arrested Thursday at her home in Victoria state where her former husband’s parents Gail and Don Patterson, Gail Patterson’s sister Heather Wilkinson, and her husband Ian Wilkinson were invited for lunch in July. All four guests were hospitalized the next day and only Ian Wilkinson survived. Erin Patterson has also been charged with three counts of attempting to murder her former husband. She will appear in court on Friday.