Erin Patterson’s two young children were also at the gathering,but did not eat the food. She was interviewed by investigators earlier this week and released without charge.
The 48-year-old has denied any wrongdoing,and told media this week those who died were “some of the best people that I’ve ever met”.
“What happened is devastating,and I’m grieving too,” she said.
Gail and Don’s son,Simon Patterson,had hisown brush with death last year after serious stomach problems left him in intensive care for three weeks.
In a Facebook post in June last year,the father of two thanked the members of the local basketball association for their support after they sent him a gift basket in hospital.
“Some of you will know that I’ve had some serious medical problems since late May. I collapsed at home,then was in an induced coma for 16 days through which I had three emergency operations,” Simon Patterson said in the post.
“My family were asked to come and say goodbye to me twice,as I was not expected to live. I was in intensive care for 21 days.
“I’m pleased to say all the medical work has seemed to have fixed the serious gut problems I had,and I’ve been feeling great.”
On Tuesday,a spokeswoman for the family declined to comment about the Facebook post. Simon Patterson did not say what the cause of his illness was.