She told the court it would be tapu for her son to now be exhumed.
And when a lawyer suggested that she had left Biddle out of many key decisions after her son's death, she said: "I am his mother, and he is my son."
Closing statements were made before Justice Gerald Nation on November 17 last year.
A week later, November 24, Charlotte passed away.
She is now buried in the family plot at Memorial Park Cemetery in Christchurch, alongside her son Jamie.
"Jamie's not alone now, he's got his mum. And we want it to stay that way," Jamie's sister Frances told the Herald.
The Pooleys and Biddle are awaiting the reserved judgment of Justice Nation.
The day before the trial began on October 31 last year, Charlotte Pooley was hospitalised.
She had just started dialysis training. Her daughter Frances and son Daniel believe the stress of the trial took its toll on her.
"It had gone on for four years and she just wanted to make it through the trial," Daniel said.
On the morning she was to give evidence, she ignored doctor's advice and discharged herself from hospital.
She phoned her children and told them: "I'm not letting my family fight this battle without me."
Her children, and husband of 46 years, Bruce Pooley, were staggered by her strength that day.
"To be as sick as she was, mum couldn't have been more strong and powerful," Frances said.
The Pooleys hope that Justice Nation's verdict gives them some closure, and lets mother and son rest in peace.
"We've been through enough, Jamie can't be moved now," Frances said.
"Surely, there's no way they can take him away from his mum."
