A child's play specialist says Macsyna King, the mother of twins Chris and Cru Kahui, told her the babies had been hurt by their toddler brother.
Kathryn Greenwood, from Middlemore Hospital in South Auckland, was first witness for the Crown in the High Court at Auckland, on the day two of the trial of the twins' father Chris Kahui for their murder.
The twins died on June 18 2006, within about 14 hours of each other at Auckland Starship Hospital, after they were admitted to Middlemore Hospital on June 13.
Miss Greenwood told the court she first met Kahui and Ms King when their twins were in the neo-natal unit in April 2006 at Middlemore Hospital.
She looked after their eldest child Shane, who was 10 months-old.
Miss Greenwood was working on June 13 when Ms King brought the twins into hospital and went to see her in the resuscitation room where the twins were being treated.
Ms King told Ms Greenwood that Shane had climbed onto a couch at home and into the twins cot and "got them".
Ms King talked about how busy she had been and how life was a balancing act, she said.
Initially Ms King was angry but became more in control over the course of the day, Ms Greenwood said.
Her observations of Shane before June 13 was that he was not an "active child" and was not able to hold himself up but could crawl, Miss Greenwood said.
More medical specialists will be called today.
