Pictures of Camilla thumbing through a programme in the VIP box between her husband Prince Charles and Australia's Prime Minister Malcolm Turnbull were widely circulated on social media, prompting some users to criticise the 70-year-old for failing to show more appreciation.
An image of the pair was shared online on Wednesday.
Her 69-year-old eldest child arrived in Australia while the country's relationships with Britain and its monarchy are under renewed scrutiny.
The schedule for the couple's six day tour was jammed packed, with the pair on Aussie soil to open the 2018 Commonwealth Games. "It's one hell of a journey for a very short space of time but the Duchess loves Australia and the people so she is really looking forward to it, even though she doesn't relish the flying".
Ms Ryan told the publication that Prince Charles did not recognise her father but they reminisced about the school and said her father was "stoked" about their interaction.
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Charles will visit northern Queensland state, the neighboring Northern Territory and Vanuatu before returning to Britain next week.
The Prince of Wales will meet with Welsh Commonwealth team members and fans.
PRINCE Charles has given a rather curt response to an Australian radio reporter's less-than-royal question about his toilet habits, telling the cheeky interviewer not to "believe all that crap".
On Thursday, they were greeted by large crowds as they visited the athletes village where they met the England women's hockey team.
Prince Charles and his wife Camilla Parker Bowles have landed in Australia for a trip Camilla reportedly joined Charles on in the hopes of helping further his chances at landing a royal title.