The fundamental issue for the jury was whether Hyacin Eruera knew her husband had a knife, Mr Balme said.
Her daughter Paris Taite had come home that night distraught, saying she had been attacked, and George Eruera called Taki so they could go and "get some answers".
"Matters progressed very rapidly from there," Mr Balme said.
"Mrs Eruera as it turns out is the licensed driver so she has to drive the car. Within a very short period of time, the parties are in the car, Mr Taki gets picked up and the car is driven by Mrs Eruera to the Welcome Bay area."
CCTV cameras had recorded the car turning into Welcome Bay Rd at 12.19am and returning the same way at 12.27am, leaving seven-and-a-half minutes for the confrontation with Brooklyn Ormsby-Ratahi on Ohauiti Rd and the drive to the Mansfield St address where Mr Tiepa-Ranapia was stabbed.
"That's indicative of how extraordinarily compressed the timeframe of all these things is. That becomes relevant when you try to determine what happened on the roadside on Ohauiti Rd."
Hyacin Eruera remained in the driver's seat of the car during the encounter with Mr Ormsby-Ratahi, Mr Balme said.
He said the main issue for the jury to consider when deciding Hyacin Eruera's involvement was whether she knew what would happen by taking her husband and Taki to Mansfield St after the Ohauiti Rd incident.
No one knew whether she had seen anything happen or in what detail, Mr Balme said.
"You just can't say she knew Mr Eruera had a knife."
Mr Balme said it was the Crown's obligation to prove guilt, the defence did not have to prove innocence.
"The defendant doesn't have to prove a single thing.
"The Crown has to prove that she has formed a common plan with Mr Eruera to carry out violent retribution ... The Crown is really asking you to say in the minute or two it takes to get to Mansfield St, the common plan was formed."
Mr Balme said Hyacin Eruera had been caught up in events not of her making.
Justice Whata summed up the Crown and defence positions for the jury before they retired at 1.20pm.
He said if the jury did not find George Eruera guilty of murder, he must be found guilty of manslaughter as he had admitted he was guilty of killing Mr Tiepa-Ranapia.
Hyacin Eruera and Taki's verdicts would depend on whether the jury found they knew George Eruera intended to seriously injure or kill Mr Tiepa-Ranapia and were therefore part of a "common plan".