According to the Crown summary of facts, Tai had been travelling along State Highway 3 around 9pm with her partner, son and niece also in the car.
While the specifics of the driving incident were not mentioned in the summary, nor in court, it did state Tai had stopped her vehicle, blocking the lane, to confront the victim.
Tai and her partner got out of their car and, fearing for her safety, the victim drove away.
But they were followed to an address in Lepperton where, in the driveway, Tai punched her in the face a number of times.
The woman yelled for help, which prompted her friend to come out of the house.