Crown Princess Mary, Crown Prince Frederik pose for official photos with son Prince Christian

Crown Princess Mary and her husband have marked a precious family milestone after a Mexican socialite denied claims of an affair.

Crown Princess Mary and her husband have been pictured together marking a precious family milestone after a Mexican socialite denied claims of an affair.

In official photos shared on Instagram, Mary and Crown Prince Frederik were pictured standing side by side as their eldest son, Prince Christian, marked a major step towards becoming the king of Denmark.

The 18-year-old was photographed with his proud parents and grandmother, Queen Margrethe, after signing the declaration of the constitution at the Council of State, which is a rite of passage for future Danish monarchs.

Prince Christian, Queen Margrethe, Crown Prince Frederik and Crown Princess Mary. Picture: Keld Navntoft, Kongehuset

The royals posted a picture of Crown Prince Frederik signing the declaration of the constitution as a teenager. Picture: Instagram

Each heir to the Danish throne takes the oath to abide by the country’s constitution when they turn 18.

In a sweet touch, the royal family posted a throwback picture of a youthful Crown Prince Frederik signing the declaration of the constitution as a teenager.

Despite the drama surrounding the royal couple, Crown Prince Frederik was all smiles on Tuesday as he hosted the annual networking meeting and dinner for the DenmarkBridge association, a group which aims to forge links between Danish companies and Silicon Valley.

Tasmanian-born Princess Mary was noticeably absent from the event, which was a solo appearance for her husband at Amalienborg Palace in Copenhagen.

Crown Prince Frederik of Denmark smiles during his solo engagement. Picture: Instagram

The pair’s marriage has been rocked by affair rumours. Picture: AFP

Crown Princess Mary was the picture of elegance at wreath laying ceremony in Copenhagen last week. Picture: Getty Images

It comes after the future Queen of Denmark made an apparent subtle statement about her love for her husband during the couple’s recent outing at the Joaquin Sorolla exhibition at the Glyptoteket Museum in Copenhagen during the King and Queen of Spain’s state visit.

Princess Mary wore an 18-carat gold petite letter necklace with the initial ‘F’ from Halberstadt, which could be in reference to her love and support for her husband.

Crown Princess Mary of Denmark wears a simple necklace bearing her husband’s initial. Picture: Carlos Alvarez/Getty Images

Princess Mary’s delicate ‘F’ necklace is being seen as a show of support for her husband. Picture: Getty Images

The royal couple make a public appearance amid affair rumours. Picture: Carlos Alvarez/Getty Images

Crown Prince Frederik’s fidelity was called into question after Spanish magazine Lecturas printed pictures of the heir to the Danish throne attending a Pablo Picasso exhibition with Ms Casanova in Madrid.

Frederik met Ms Casanova “several times a year” since the pair got acquainted on a high-end hunting trip, according to new claims.

Their connection has been the subject of intense speculation after photos emerged of the duo enjoying an evening out together in Madrid, as rumours swirl about an alleged affair.

Now a Spanish TV presenter has revealed the pair “have a friendship”, according to new information she said she received “from Genoveva’s entourage”.

Prince Frederik, photographed in Copenhagen on November 7. Picture: Getty Images

Genoveva Casanova has denied rumours of an affair. Picture: Instagram

Susanna Griso, host of the current affairs show Espejo Publico (which translates to Public Mirror), said the heir to the Danish throne and the reality TV star met in the Alps.

It’s understood they crossed paths on a big-budget hunting trip, the likes of which are frequently attended by European royals and usually held in Germany or Austria.

“They know each other and have friends in common. They usually meet several times a year. They tell me that they are private meetings that are with more friends of the group, some members of royalty,” Ms Griso said on her show, according to Lecturas magazine.

“They meet and sleep in private houses”.

Prince Frederik and Princess Mary have not commented on the rumours. Picture: AFP

Prince Frederik looked upbeat as he visited a science park on Friday. Picture: Instagram

It seems he’s committed to carrying out business as usual. Picture: Instagram

The 55-year-old Crown Prince, who is married with four children, and the 47-year-old media personality, who is divorced, were photographed attending a Picasso exhibition in October.

The duo had dinner at a local restaurant and he was seen visiting her apartment.

The couple hosted the King and Queen of Spain in Copenhagen this week. Picture: AFP

Ms Casanova categorically denied the rumours in a statement to Hola! magazine.

She is now reportedly in hiding, having boarded a plane for an unknown destination just hours after the photos were released and turned off her phone to avoid calls.

“The two have been in contact and have decided not to speak and not to fuel speculation at all,” Ms Griso said.

Originally published as Crown Princess Mary, Crown Prince Frederik pose for official photos with son Prince Christian