They took off with her still in the vehicle and came across two more of the girls involved. Again Lupe and Angelica Pailate got out, this time a second 12-year-old and a 11-year-old were dragged by their hair into the car. One of them was also kneed in the head.
After this the trio then stopped at the Flaxmere Community Policing Station to hand the girls over.
The station was empty, so they kept them captive, taking them back to their home for about half an hour.
From there Mafi called the police and was told they could not keep the girls and to release them.
"Stuff like that happens in Flaxmere every day," the 12-year-old complainant's mother said outside court. "But you don't go jumping in your car and beating up children. I'm glad justice was served. I wish they could have got a bit more, but I'm glad it has been served."
She knew the residents involved as she lived around the corner from them. It was her daughter and two nieces who were the victims.
"The victim impact statements from each of the three girls shows this was particularly distressing and upsetting," Judge Bridget Mackintosh said. "I have no doubt, that for them, it was a very traumatic incident."
It was a situation that had spiralled out of control but she accepted Mafi and Lupe Pailate had recognised their behaviour was completely inappropriate.
In light of the three strikes rule it was a example of how something "relatively innocuous has been elevated into something very, very, serious", the judge said.
Angelica Pailate was not sentenced yesterday so electronic monitoring could be considered.
Kidnapping carries a maximum punishment of 14 years imprisonment, but Judge Mackintosh and defence lawyers Amit Malik and Tony Snell said there were no cases the court could refer to.
"Despite a detailed search there are no cases that counsel could find that were similar or on par with this," Mr Snell said. "It does not fit the mould for a kidnapping type of case."
He called for a community-based sentence because of Lupe Pailate's early guilty plea, remorse, a track record of employment and her role as primary breadwinner for her family.
Mr Malik said Mafi needed to be home to care for her mother, and was at a low risk of reoffending.
The pair were sentenced to community detention for three months and 130 hours community work. Mafi would also be under supervision for six months.