She met her husband Chris Atkin at Massey also a singing student, and for a few years they lived in Wellington before moving to Brisbane when Chris went into the IT industry.
"He's stopped singing now."
But for Shannon a strong yearning to sing again took over.
"It was like something was missing in my life, I was missing a huge and important part of my life and I had to get back to it. I had to have singing in my life again."
She enrolled in a music conservatory in Brisbane and joined a 15-strong vocal ensemble called Fusion.
"We sing classical music from all different periods and it's such a relief to be back singing again."
Her decision to apply for the opera school was to come and study stagecraft, language and voice from some of the best tutors there are.
"It's really dusting away the cobwebs for me and it's so emotional ... well I'm an emotional person."
After a master class with acclaimed voice coach Professor Paul Farrington she said was so exhausted she could hardly think afterwards.
"But it was brilliant and so helpful and I'm truly thankful."
Deep down Shannon said she wants to come home to New Zealand, Kiwi people and family.
"It's not that I dislike Australia but the people expect so much and most don't realise they live in such a privileged country. I just love the way Kiwis have a social conscience and they're kinder."