"It's incredible, it's amazing, we all thought she was dead. Thank God, she's alive."
She said her daughter was now recovering in hospital.
Police have not confirmed any of the circumstances around Ms Fraser's reappearance, other than to say she was found safe and well on Wednesday morning.
Ms Fraser had gone to the swimming hole with two men including her partner.
Her partner later told police he'd left her sitting alone under a gazebo near the river but when he returned five or 10 minutes later, she was gone.
Her disappearance sparked an intensive search, police suspicions she might have met with foul play, and a public appeal for information by her mother.
- AAP