The controversy is particularly sensitive because Eugenie has historically enjoyed a close relationship with Harry, including during the early stages of his romance with Markle in 2016.
The Sussexes are said to have regarded Eugenie and her sister, Princess Beatrice, 38, as valuable family connections following their return to Britain from California – but sources tell us both sisters have since kept their distance from the Sussexes.
Harry and Markle relocated to the United States in 2020 after stepping back from senior royal duties, subsequently making damaging allegations about their experiences within the monarchy.
Harry’s memoir Spare included an account of a confrontation in which he alleged Prince William, 44, physically attacked him during an argument about Markle. Relations between Markle and Catherine, Princess of Wales, 44, have also been strained following disagreements surrounding the Sussexes’ 2018 wedding.
Reports about the bridesmaids’ dresses initially suggested Catherine had been reduced to tears, although Markle subsequently offered a different account of the dispute.
Since returning to Britain, the Sussexes have been establishing a new home in the Cotswolds while maintaining their professional interests.