Prince Charles, Queen Elizabeth II, Prince Andrew
Pictured: Princes Charles, Andrew, Her Majesty following the Queen's Birthday parade, 'Trooping the Colour,' in central London on June 15, 2013. Getty Images/Carl Court/AFP

Queen Elizabeth II has a different relationship with Prince Charles and Prince Andrew.

It is not a secret that the Prince of Wales grew up in the care of the staff. However, the Queen had a different approach to motherhood after welcoming the Duke of York.

“It is no secret that of her four children Andrew is the Queen's favourite,” journalist Sue Arnold wrote.

She added that Prince Edward and Prince Andrew represented the Queen’s second family and her real family. Prince Andrew was born 10 years after Princess Anne. Her Majesty was distant to her first two children as she was occupied with being the head of the Commonwealth. But she was close to her two youngest sons.

“She has never been close to Charles,” Arnold added. “Andrew has always been Mummy’s boy. He was the result of a reconciliation between the Queen and Prince Philip, whose marriage had been through a sticky patch.”

The author added that for the Queen, Prince Andrew “can do no wrong.” The Duke of York could tickle the Queen under her ribs until she gasps and begs him to stop. Meanwhile, the Prince of Wales was “too reticent to indulge” while Prince Edward was “too serious.”

According to Andrew Morton in his book “Andrew: The Playboy Prince,” Prince Andrew called his mom and nanny Mabel Anderson “Mamba.” Anderson was Prince Andrew’s constant companion and Queen Elizabeth II would look forward to her night off so she could go to the nursery and bath and read stories to Prince Andrew, her favorite son.

Earlier this year, the Queen appointed Prince Andrew as the new Colonel of the Regiment of the Grenadier of Guards. Prince Philip used to hold the position until his resignation in 2017.

Prince Andrew’s appointment was considered a deliberate snub to Prince Charles because the position puts Prince Andrew at the center of the most important events in the royal calendar. The Prince of Wales wanted to streamline the royal family when he reigns and wanted to remove the Yorks in important events.

In 2012, Prince Charles snubbed Prince Andrew and his family by not inviting them to Queen Elizabeth II Jubilee year. According to a source, Prince Philip would have not approved it if he was there. However, the Duke of Edinburgh was sick and also didn’t make it to the gathering.