Mr Warner, 58, suffered moderate back injuries, and was last night discharged from Taranaki Base Hospital. He was "doing well", the couple's eldest son Adam Warner said.
"Mum is in a stable condition with chest and back injuries," he said in a statement released by the hospital.
"Contrary to some media reports, her condition has not deteriorated and she is currently recovering at Taranaki Base Hospital."
She was expected to make a full recovery, he said.
"Both mum and dad want me to pass on that they really appreciate all the well wishes and support the family has received."
However, neither of them would be giving interviews, he said.