"It was just something that I did because I was very close to my father," she said.
"Back in the old days, as a sign of grief, women used to scar their chest. So it's done to depict kind of the scraping."
Ms Mahuta also has a special tribute to her late aunt: Maori Queen Te Atairangikaahu.
"When my aunt passed, I got her symbol - the kaahu [hawk] - done on my shoulders. So they depict the wings of a kaahu.
"Only if I'm wearing a sleeveless shirt you'll see part of the wings."
Her latest ink, like her other tattoos, is again linked to a family story and this time includes her two children: 5-year-old son Waiwaia Nukutawhiti and 2-year-old daughter Niua-Cybele.
Ms Mahuta has two taniwha drawn on her feet; which represent each of her tamariki - whose names both derive from taniwha.
"My daughter's name comes from the Hokianga. The taniwha depicts the Hokianga Harbour, which is where the name comes from."
Her son's name comes from the taniwha connected to the Waipa and Waikato Rivers.
Asked why she had them tattooed on her feet, her answer comes quickly.
"I put them on my feet to keep me grounded - as they do.
"And when I put my feet together, they make a fin. The two designs connect as one."
She acknowledged that many people had no idea she had tattoos - and she liked it that way. They are not for show.
"It all tells a story and it's all relevant to my life ... it's always been a result of a story of what I want, the story of where I come from, my parents and my whanau. And that's pretty special."