The pregnant wife of Britain's Prince Harry, Meghan, the Duchess of Sussex, will cut back her busy schedule as the royal couple enter the last week-and-a-half of their tour to Australia, New Zealand and the South Pacific.
"That word "normal" looms very large for Harry and Meghan when it comes to their child's future", the source added.
Harry, who wore khaki pants and blue shirt, and Meghan, in an ankle-length striped dress, had kicked off their shoes to sit with members of community group OneWave, whose members wore brightly-colored shirts and flower garlands.
Meghan Markle, Duchess of Sussex, will travel to Fraser Island but locals won't get the chance to see her after the palace confirmed she won't take part in any official engagements.
Kensington Palace says the couple has made a decision to slightly reduce Meghan's schedule "for the next couple of days" ahead of the final week-and-a-half of the tour.
Kensington Palace confirmed on Monday that Meghan and Harry were expecting their first child in the United Kingdom spring, which runs from March 20 to June 21.
There were also crowds along Liverpool Street, while other people - and a cardboard cutout of Harry and Meghan - watched on from balconies as the royals arrived.
Next Saturday, the Duchess herself is expected to make her first Invictus speech at the closing ceremony, as she continues to find her feet as a member of the Royal family. Last week at Bondi she told a wellwisher she had been up at 4.30am doing yoga.
"It's been an exhausting week, and although the Duchess hasn't had any morning sickness, she has been very exhausted", Royal reporter Emily Andrews said on Twitter this morning. She also wished that the Duchess of Sussex has an fantastic pregnancy and that it goes just the way she wants it to be.
The couple are due to leave Australia for Fiji and Tonga on Tuesday.