Meghan Markle and Prince William reportedly found themselves in a furious bust-up after the Duchess of Sussex made a comment about her sister-in-law's hormones.
In a leaked extract of his new book Spare, Prince Harry claims that in the run up to their wedding in 2018, Meghan brazenly told the Princess of Wales that she must have "baby brain".
The comment wasn't well-received and the foursome later met in a bid to try and move past the incident - but this led to a row between Prince William and Meghan, the book claims.