Games president Louise Martin said Camilla was "shattered" after a long plane journey and official duties, but denied that she was "tired and disinterested".
Several media outlets leapt on images of the Duchess of Cornwall leafing through a programme during Wednesday's proceedings as evidence that she would rather have been elsewhere.
"Can I assure you that is not true," Martin said. "She was absolutely shattered. She was jetlagged.
"She'd just got off the plane in the morning, was on a full duty right through and the only time she'd got a break was when she sat in a car from Brisbane down to (Gold Coast).
"And then she got 20 minutes to change before she went into another reception and then straight up to the ceremony.
Camilla was a guest of honour at the ceremony -- especially as her husband Prince Charles, the heir to the British throne, had the duty of declaring the Games open.
"She really enjoyed herself. I didn't see the facial expressions, etc, but the comments between the Duchess and Prince of Wales and myself... she was asking questions all the time. They both enjoyed it," said Martin.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.) Click for more trending news
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.