In a reconstruction of the fatal fire, investigators believed Hansen put her evening meal in the oven and on the stove and left it to cook while she watched television in another room.
When she realised there was a fire in the kitchen she had tried to put out the flames using her clothing.
Scott said when she realised it was spreading too quickly she and her pet dog tried to escape, however, it was too late. Hansen suffered from mobility issues and could not move quickly.
"Had this not been the situation I believe it is most likely that she and her pet dog would have escaped from the fire. Sadly that was not to be," Scott said.
Their bodies were found by firefighters close to the back door.
Scott said Hansen also had alcohol in her blood which may have compromised her already slow movement and contributed to her inability to escape.
Scott offered his condolences and sympathy to Hansen's family and thanked the police and fire service for their help.
Kiwi musician Sam Hansen, aka rapper PNC, paid tribute to his mother last year saying he owed his music career to her.
"I never would have done [what I did] if it wasn't for her ... She gave up her life for me and she was happy if I was happy."
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