Britain's Prince William and Catherine Duchess of Cambridge
Britain's Prince William and Catherine Duchess of Cambridge visit The Fire Station, a newly converted music and arts club, in Sunderland, Britain, February 21,2018. Reuters/Andy Commins/Pool

Then-commoner Kate Middleton knew marrying into royalty would entail a lot of sacrifices on her part, and so Prince William reportedly made a promise to her to sweeten their deal.

According to reports, Kate was hesitant to marry the second in line to the throne because once she became part of the royal family, she would be expected to leave her own family behind.

Prince William, Kate Middleton official wedding
Britain's Prince William and his bride Catherine, Duchess of Cambridge (C), pose for an official photograph, with their families, on the day of their wedding, in the throne room at Buckingham Palace, in central London April 29, 2011. (Front row L-R) Grace van Cutsem, Eliza Lopes, Prince Philip, Britain's Queen Elizabeth, Margarita Armstrong-Jones, Louise Windsor, William Lowther-Pinkerton. (Back Row L-R) Tom Pettifer, Camilla, Duchess of Cornwall, Prince Charles, Prince Harry, Michael Middleton, Carole Middleton, James Middleton, Pippa Middleton. Photograph taken on April 29, 2011. Reuters/Hugo Burnand/Clarence House/Handout

Vanity Fair’s Katie Nicholl said on the documentary “Kate Middleton: Working Class to Windsor” that William had to break tradition to marry the girl that he loved.

“Once you married into the Royal Family, you became a Windsor and that was that,” she said. “Well, it was different when Kate and William got married.

“When William asked Kate to marry him, he made it very clear that she wouldn’t have to leave her family behind once she married into his family. He promised her that they’d always stay a part of the family and they have done.

“Whether it’s joining the Queen at Ascot or being on an important barge within the Queen’s fleet at the Diamond Jubilee celebrations, they’ve been there.”

The Middletons have indeed remained part of the Duchess of Cambridge’s life. They attended many Royal engagements and had even been invited to Prince Harry and Meghan Markle’s wedding in May. Harry had also been invited when Kate’s younger sister, Pippa, married James Matthews last year. He brought Meghan for the evening reception.

Michael and Carole Middleton
Michael and Carole Middleton arrive for the christening of Prince Louis, the youngest son of the Duke and Duchess of Cambridge at the Chapel Royal, St James's Palace, London, Britain, July 9, 2018. Dominic Lipinski/Pool via Reuters
Pippa Middleton and her husband James Matthews
Pippa Middleton and her husband James Matthews arrive for the wedding ceremony of Britain's Prince Harry, Duke of Sussex and US actress Meghan Markle at St George's Chapel, Windsor Castle, in Windsor, Britain, May 19, 2018. Odd ANDERSEN/Pool via Reuters

According to the Mirror, Meghan’s mum, Doria Ragland, would likely be given the same special treatment as the Middletons. Doria, the only family member who attended the Duchess of Sussex’s wedding, remained close to her only daughter even as Meghan apparently cut communications with her father and half-siblings.

(Left-right) Doria Ragland, mother of the bride, the Prince of Wales and the Duchess of Cornwall
(Left-right) Doria Ragland, mother of the bride, the Prince of Wales and the Duchess of Cornwall walk down the steps of St George's Chapel in Windsor Castle after the wedding of Prince Harry and Meghan Markle Windsor, Britain, May 19, 2018. Brian Lawless/Pool via Reuters