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She admits she was nervous before shedding her clothes for the Sydney shoot - "it's lingerie".
But Hunter, who is based in Los Angeles, gave her daughter some simple advice.
"I think it's just to always have fun and be yourself and be comfortable. I think that's the best advice you can give anyone."
Stewart is based in London where she's studying towards a dance degree at the London Contemporary Dance School. Dancing has always been her passion and she hopes to eventually sign with a professional dance company.
"It's just an amazing way to be able to express yourself through movement."
She launched her modelling debut in New Zealand in 2010 when as a 17-year-old, Stewart helped Hunter reprise her role in a television hair commercial that yielded the Kiwi catch-cry: "It won't happen overnight - but it will happen."
Stewart says she has a special relationship with New Zealand and its cuisine - "you really do good eggs" - and loves returning to see family and visit the beaches.
She will fly out tonight bound for LA for three weeks' holiday before returning to her studies in London.
Images from the Bendon shoot are expected to be unveiled early next year.