Despite Balkind's claims she was trying to assist McPherson, witnesses at the scene said she was still "arguing, and angry" with her husband.
"At some point you said to those who had gathered to help, 'I don't know why you're bothering with him, he doesn't care about me'.
"As bystanders attempted to assist Dingle you came in and out of the camper van.
"You were upset and apparently angry telling Dingle, 'This is all your fault, you always do this'."
The dispute between the couple reportedly begun over the cost of an Albatross Encounter tour, and threats from McPherson to kill Balkind's cat.
In his victim impact statement, McPherson's 29-year-old son's said he had lost his main support system, "not just his dad but one of his best friends who would be there for him in a heartbeat", the judge said.
Justice Clark cited McPherson's daughter's "heartbreak and how the day before her father's death was the last day she has spent without tears".
The Crown argued the exact details of the events leading up to McPherson's death would never being know, but described his killing as "extreme violence", Stuff reported.
"This was not a single stroke killing."