Kate Middleton reportedly felt "isolated" when Prince William's pals and palace officials made "snobby jibes" about her mum Carole Middleton.
The couple briefly split up in 2007 as the media reported at the time that Kate tried to laugh off the jibes but ultimately worried she would never be accepted within William's aristocratic circle.
Prince William's friends would "ridicule" Carole's former career as an air stewardess, as reported in The Mirror in April 2007 during the couple's short-lived break.
Furthermore, courtiers also said Kate was unsuitable for William as Carole did not speak eloquently enough.
The Daily Mirror's Royal Correspondent at the time Vanessa Allen reported that a royal insider said: "She [Carole] is pushy. Rather twee and incredibly middle class.
“She uses words such as ‘pleased to meet you’, ‘toilet’, and ‘pardon’.”
Kate had apparently tried to laugh it off, but became increasingly isolated and abandoned as she feared she would never be accepted by William's pals, who are the upper-crust of British society.
The Prince was said to have enjoyed taking breaks from the pressures of the highest echelons by relaxing at Kate's £1million family five-bedroom home.
Another Palace insider added: "William got on well with Carole. He liked flopping down on the sofas of their Berkshire home, enjoying the normality of that.
"The Queen was fond of Kate and liked her father.
"But let's just say there was a feeling that Mrs Middleton was not right or acceptable."
Carole raised eyebrows when, on first meeting the monarch, she greeted her with "Pleased to meet you" instead of "Hello Ma'am".
Carole and former pilot husband Michael became self-made millionaires through their successful business Party Pieces, a mail-order firm for kids' costumes.
Neighbours of the Middletons at the time reportedly branded the family as "ghastly" people who were "social climbers" and accused Carole of grooming Kate to be a royal bride.
Reports at the time added that Prince William couldn't "away from the fact his future mother-in-law was looked down upon in senior royal circles".
Within a few months after publishing, Kate and William were back on.
Kate and William married in April 2011 at Westminster Abbey.
They have three children: Prince George, eight, Princess Charlotte, six, and Prince Louis, three.
The Duke of Cambridge has reportedly always had a good relationship with Carole and her family.
He has even brought the Middletons along for royal events such as Prince Harry and Meghan Markle ’s wedding, the Queen’s Diamond Jubilee celebrations and Royal Ascot.
Michael and Carole have also gone on holiday with the royal couple and their grandchildren on the private Caribbean island of Mustique.
Kate reportedly feeling isolated as an outsider by the Royal Family was not an unfamiliar feeling.
Meghan Markle also reportedly felt isolated while trying to fit in with The Firm in the run-up to her wedding in 2018.
