Princess Diana was left in floods of tears after overhearing a conversation about her involving ex-BBC reporter Martin Bashir, her former butler claims.
Earlier this month an official report blasted the journalist for using deceitful methods to secure the bombshell Panorama interview in 1995.
Now Paul Burrell claims the Princess of Wales, who died in 1997, was deeply hurt after listening in on a phone call in which Bashir made "disrespectful" remarks about her.
He is alleged to have pushed Mr Burrell for information about which "boyfriends" Diana had been with.
This left her "gobsmacked", the former servant told The Sun on Sunday.
Mr Burrell said: "Martin was being very disrespectful, everything was 'she' this and 'she' that.
"He was asking where she was and 'Has she been out with one of her boyfriends again?'"
This left Diana feeling "betrayed", he claimed, as the journalist was always very respectful to her face.
Mr Burrell said Bashir spoke about Diana as if she was "flighty" and wasn't returning his calls, adding: "It was a very uncomfortable moment."
A report into the interview, published earlier this month, concluded that Bashir acted inappropriately and in serious breach of BBC guidelines.
The broadcast, watched by 20 million viewers, saw Diana admitting to an affair and claim "there were three of us in this marriage, so it was a bit crowded".
The BBC set up the investigation, headed by former senior Court judge John Dyson, in November following allegations from Diana's brother Charles Spencer that he had been tricked into introducing her to Mr Bashir.
The report said: "Mr Bashir deceived and induced him to arrange a meeting with Princess Diana.
"Mr Bashir acted inappropriately and in serious breach of the 1993 edition of the Producers' Guidelines on straight dealing."
In an unprecedented and highly personal recorded statement, following the devastating findings of an independent report into the BBC practices in landing its “scoop of the century”, The Duke of Cambridge called for BBC’s flagship investigative programme to never air again.
Incredulous William went further to suggest Panorama “holds no legitimacy and should never be aired again” adding: “It effectively established a false narrative which, for over a quarter of a century, has been commercialised by the BBC and others.”
His anger was shared by brother Harry, who said: "The ripple effect of a culture of exploitation and unethical practices ultimately took her life."
Harry said that the finding was "the first step towards justice and truth" and praised those who had pursued the unethical practices.
