She was told two of her sons had been "groomed" but not told by whom.
TheCYF woman's manner was so "insensitive" that she asked her to leave.
"The next person that came, I was willing to let them talk to my son. By then two days had gone by, the kids had been to school and they'd changed their minds."
The mother believes if CYF had acted differently they could have stopped Parker abusing again. She is preparing to make an official complaint.
"It wasn't executed properly. They're saying there wasn't enough evidence there at the time. I blame CYF. I'm really angry."
In hindsight the mother recognised signs of abuse in her son.
"He was aggressive, horrible and hard to be around. He was terrible at school for the last year and a half, and we never picked up on it," she said.
She said her sons had stayed nights on mattresses in the lounge at Parker's farm which was a "really nice place" with cows, sheep, goats and birds.
Her son had cried watching Parker's court appearance on TV, and felt guilty for getting a man he'd known his whole life into trouble.
Despite Pamapuria principal Stephen Hovell having been warned about Parker three years ago, the mother did not hold him responsible.
