In a revealing new biography, British journalist and royal biographer Robert Jobson delves into the tumultuous early years of Prince William and Kate Middleton's relationship. The book, titled "Catherine, The Princess of Wales," sheds light on a lesser-known episode where Prince William ended their relationship over the phone, only for the couple to reconcile at a "naughty" costume party months later. This intimate look into their relationship offers a fresh perspective on the royal couple who have since become a beloved fixture in the public eye.

Jobson's book, which features an extract published by the Daily Mail, recounts the couple's brief breakup in 2007, three years before their engagement. At the time, their relationship was becoming increasingly serious, with Middleton invited to attend William's military graduation in December 2006. However, an abrupt cancellation of their New Year's Eve plans that year left Middleton feeling uneasy.

Her concerns were soon validated when William called her for an "emotionally charged 30-minute conversation" to break up with her. The prince reportedly told Middleton that they "needed a bit of space" to "find our own way" and that he was not ready to promise marriage. This unexpected phone call was a significant blow to Middleton, who felt devastated by the manner of the breakup.

Following the split, William was seen at Mahiki nightclub in London, celebrating his newfound freedom. Meanwhile, Middleton took trips with her mother and friends and was often seen at London nightclubs with her sister, Pippa Middleton. Despite the public appearances of moving on, both were clearly affected by the breakup.

The turning point came at a "Freakin Naughty"-themed costume party, where William seized the opportunity to win Middleton back. Dressed as a nurse, Middleton immediately caught William's eye upon his arrival. The couple spent the night talking, dancing, and eventually kissing, reigniting their romance. This party marked the beginning of their journey back to each other.

Three years after their reconciliation, William proposed to Middleton in 2010. The couple married in a grand ceremony at Westminster Abbey in April 2011, watched by millions around the world. They have since welcomed three children: Prince George, 11, Princess Charlotte, 9, and Prince Louis, 6, solidifying their status as a royal family beloved by the public.

Reflecting on their brief separation during a 2010 engagement interview with ITV News' Tom Bradby, both William and Kate offered insights into their young romance. "We both were very young, it was at university, we were sort of both finding ourselves as such and being different characters and stuff," William said. "It was very much trying to find our own way and we were growing up, and so it was just sort of a bit of space and a bit of things like that and it worked out for the better."

Kate admitted that she "wasn't very happy about it" at the time but acknowledged that the breakup made her a "stronger person." "You find out things about yourself that maybe you hadn't realized, or I think you can get quite consumed by a relationship when you are younger, and I really valued that time for me as well although I didn't think it at the time. Looking back on it," she explained.

Jobson's biography provides a detailed account of the early challenges faced by the royal couple, illustrating the resilience and growth that have come to define their relationship. As they celebrated their 13th wedding anniversary in April, the couple's journey from a phone breakup to becoming one of the most admired couples in the world is a testament to their enduring love and commitment.