Kate Middleton and Prince William: Is there a mole in the palace?
The couple, both 30, has been told to watch who they reveal any personal details to after a series of recent leaks.
Distressed Kate now fears someone may have a secret nasty agenda.
Officials are already questioning staff at the Chateau d'Autet, which belongs to The Queen's nephew Viscount Linley, after Kate was photographed topless on the private property.
'It's been years since the Palace had to deal with a situation like this,' says a source.
'But there are suspicions because some things have come out regarding Kate, Wills and Harry that very few people knew about.'
Kate's put on a brave face during the topless photo scandal, but questions have now been raised over who tipped off the photographer - rumoured to be Irish - that she and Wills were staying at the isolated chateau.
Read more about Kate Middleton and Prince William in Now magazine dated 8 October 2012 - out now!