King Charles III was said to be unhappy by his siblings' show of support for the embattled Prince Andrew.
Pictures of Andrew at a shooting party on the Windsor estate alongside Prince Edward and Prince Andrew were met with a frosty response from the palace, according to The Mail on Sunday.
The gathering, which took place two days before His Majesty's 74th birthday, had intended to be a show of support for Andrew, who continues to fall foul of the monarch amid accusations surrounding his former involvement with convicted sex offender Jeffrey Epstein.