Queen Mary of Denmark puts on a stylish display in jeans as she departs Sydney with her children after secret trip to Australia without husband Frederik

Queen Mary of Denmark was spotted leaving Sydney on Thursday with her children after enjoying a low-key trip to Australia.

It is understood the Australian-born Danish monarch, 52, flew home to Hobart last week to attend her niece's wedding before travelling to Sydney, where she soaked up the sun at some of the city's most picturesque beaches .

After spending almost a week in her home country, Mary was seen jetting out of the country with her 13-year-old twins Josephine and Vincent.

The mother-of-four put on a stylish display in blue jeans and a white shirt as she arrived to the airport in a black car.

She carried a large brown handbag as she stepped out of the vehicle with her two children.

Mary last visited Australia in December with her twins to spend Christmas with her family.

While the trip was a personal one, with the Queen keeping a low profile without her husband present, the monarch had an official royal engagement in Australia just months earlier.

She visited Sydney for a day in late April 2023 to 'participate in an event with Danish business representatives involved in the green transition in Australia, as well as visit a number of Danish-clad projects related to sustainable construction and transport'.

Mary's return to Australia comes 12 months after rumours exploded about her husband King Frederik, 56, having an affair with Mexican socialite Genoveva Casanova, which have been strenuously denied.

Frederik did not join his wife on her trip to Australia, choosing to stay in Denmark on official business .

However, his decision to stay home has raised the eyebrows of Danish royal fans who have closely watched the couple since the 'affair' scandal rocked their relationship.

Cracks began to appear in the pair's fairytale romance after the then-Crown Prince was photographed on a night out with Ms Casanova in Madrid last October.

The once 'playful, tactile' royal couple appeared icy and detached in their first public appearance following the photos being published by Spanish magazine Lecturas.

Since then, fans have mourned the outwardly loving relationship the couple once shared, with many claiming the fire has gone out between them.

Ms Casanova strongly denied any affair with Frederik immediately after pictures of the pair together emerged and has refused to speak on the matter since.

Weeks after the pictures of the now King and Ms Casanova were published, Mary was spotted on another holiday in Sydney without Frederik.

During that visit she climbed the harbour bridge with Prince Vincent and Princess Josephine.