Paul said by 7am it was all on, with plenty of sweating, yelling and a little swearing.
The midwife was called from Kaitaia, but the 30 minutes it took her to get to Mangonui was more than enough for the couple's neighbours to offer their assistance.
"They were all keen to help, grabbing sheets and towels," Paul said, but Rachael was adamant that she would deliver the baby in hospital.
Midwife Ms Waldron said she noticed police lights behind her at Awanui but there was no way she could stop - not even for the police.
"Rachael was telling me to go faster or else she was going to have it in the car," Ms Waldron said, who has worked in the Far North for three years since graduating.
"I was getting up to 130km/h on the straights but I was quite sure we were were going to have a baby on the way. I was prepared to pull over and I had an emergency birthing kit I carry all the time."
Police managed to stop the speeding driver near Pak'n Save.
Senior Sergeant Chris McLellan said he was on his way to work at Kaitaia police station in an unmarked car when he saw the speeding four-wheel drive vehicle at Awanui. He signalled for the vehicle to stop but the driver ignored the flashing blue and red lights.
"I engaged in a pursuit. The speeds were getting up there but the vehicle was staying in the lane and the driver was indicating when they passed other traffic," Mr McLellan said.
"It didn't feel like your normal pursuit that usually involves some erratic driving."
When the driver stopped and explained she had a pregnant woman onboard who needed to get to hospital the pursuit immediately became a police escort.
"I took a look at the pregnant woman's face and I knew she wasn't ready to negotiate anything and the only place she wanted to be was hospital," Mr McLellan, a father of three, said.
"We blocked off the side roads and escorted her like a presidential visit to Kaitaia Hospital."
William was crowning before the car screeched to a halt outside the maternity ward and arrived about 10 or 15 minutes later.
After all the drama Paul missed the birth. He had taken their 2-year-old first-born outside to cool off in the fresh air for a few minutes.
William weighed in at seven pounds 15 ounces (3.6kg) and in good health.
No tickets were issued. Mr McLellan said it was not uncommon for babies to be rushed to hospital but had words of warning: "If you are using this excuse for speeding you better be pregnant."