'It's none of their business': Caitlyn Jenner feared 'untrustworthy' Kardashians would leak news of her gender reassignment... as she insists the surgery is 'no big deal'

Caitlyn Jenner has admitted she 'didn't trust' the Kardashians enough to inform them of her gender reassignment surgery - for fear they would leak the news to the press.

The 68-year-old spoke on Piers Morgan’s Life Stories, which is set to air on ITV on Thursday, about his fractious relationship with his former wife Kris and step-children following a war of words over the release of Caitlyn's book The Secrets Of My Life.

The family came to blows over the release, which saw Kim insist Caitlyn needed to 'grow up', before the explosive contents of the book eventually ending in the termination of any relationship between the duo at all. 

No trust: Caitlyn Jenner has admitted she 'didn't trust' the Kardashians enough to inform them of her gender reassignment surgery - for fear they would leak the news to the press

No trust: Caitlyn Jenner has admitted she 'didn't trust' the Kardashians enough to inform them of her gender reassignment surgery - for fear they would leak the news to the press

Caitlyn has been caught up in a feud with her ex-wife Kris and stepdaughters Kourtney, 38, Kim, 37, and Khloe, 33, since splitting with Kris before undergoing gender reassignment surgery.

The ongoing spat was touched on again during a recent episode of Keeping Up With The Kardashians when 62-year-old Kris talked again about how she feels about her ex-husband's memoir, admitting it had hurt her.

Kendall has hinted that she and her siblings might have known more about their father's struggle with his gender identity than they admitted to their mother.

Caitlyn has now spoken further about her plight as she simply replied: 'No' when Piers asked if he had sent Kim an abridged version - which she insisted happened.

In depth: The Olympian spoke on Piers Morgan's Life Stories about her fractious relationship with his former wife and step-children following a war of words over the release of Caitlyn's The Secrets Of My Life

In depths: The 68-year-old Olympian spoke on Piers Morgan’s Life Stories, which is set to air on ITV on Thursday, about his fractious relationship with his former wife and step-children following a war of words over the release of Caitlyn's The Secrets Of My Life

The whole familyL The family came to blows over the release, which saw Kim insist Caitlyn needed to 'grow up', before the explosive contents of the book eventually ending in the termination of any relationship between the duo at all

The whole familyL The family came to blows over the release, which saw Kim insist Caitlyn needed to 'grow up', before the explosive contents of the book eventually ending in the termination of any relationship between the duo at all

Piers asked: 'So you sent her the entire book?', to which she replied: 'Except for the last few pages when I talked about gender confirmation.'

He went on: 'They didn’t know that you had actually had the surgery?' followed by Caitlyn's shock reply: 'No I didn’t tell anybody. Why? It’s none of their business.'

She said: 'No it’s not that big a deal. Nobody knows. I had to be honest, the book is about honesty. It’s called The Secrets of My Life. No it really wasn’t a big deal. 

'I had already been living as Caitlyn for a year and a half, ok, nobody knows anything. Because I didn’t want them to leak it to the press. Ok. And there was no reason for them to know about it. Of course not - of course I didn’t trust them, yeah.'

Chatting away: He went on: 'They didn’t know that you had actually had the surgery?' followed by Caitlyn's shock reply: 'No I didn’t tell anybody. Why? It’s none of their business'

Chatting away: He went on: 'They didn’t know that you had actually had the surgery?' followed by Caitlyn's shock reply: 'No I didn’t tell anybody. Why? It’s none of their business'

Loggerheads: Caitlyn has come to loggerheads with ex-wife Kris after the release  of her book

Loggerheads: Caitlyn has come to loggerheads with ex-wife Kris after the release  of her book

Elsewhere in the interview, Piers was forced to defend himself during the Life Stories interview after making a quip about her surgery.

During the pair's chat TV personality Piers, 52, questioned the star, formerly known as Bruce Jenner, about how she'd changed physically, before adding there are 'certain areas we know about'.

The comment appeared to rile up the onetime Olympian, who shot back: 'You made a comment there and that's why you would get in trouble, OK? You said "certain areas" - that, to a trans-person, is disrespectful.' 

Confrontation: Caitlyn Jenner butted heads with Piers Morgan during an appearance on his Life Stories show, after the TV personality made a quip about gender reassignment surgery

Confrontation: During the pair's chat TV personality Piers, 52, questioned the star, formerly known as Bruce Jenner, about how she'd changed physically, before adding there are 'certain areas we know about'

After Piers, who held a male doll resembling Caitlyn during her past as a younger athlete in his hand, defended his decision to make the comment, Caitlyn continued: 'It's not funny. It's life. It's a very serious part of my life.

'I take that very seriously and so out of respect to myself and the community, it's not something that you joke about. This is serious stuff. People die over these issues. It's not a joke.' 

After explaining that found frank discussion over the matter 'educational' and a complex issue', GMB host Piers conceded: 'Point taken.'

Riled up; Caitlyn, formerly known as Bruce Jenner, got riled up when Piers asked about how she'd changed physically, before adding that there are 'certain areas we know about'

Riled up; Caitlyn, formerly known as Bruce Jenner, got riled up when Piers asked about how she'd changed physically, before adding that there are 'certain areas we know about'

At the start of their exchange, Piers said to Caitlyn: 'You were an all-American, 6ft 2in muscle-bound guy. When you look at that guy what do you think?' 

Caitlyn responded: 'Good for him. There is a lot more to this story than just that.'

But things took a turn for the worse when Piers then asked: 'How does your physique compare now to what it did then? Obviously, certain areas we know about.' 

However, the conversation soon recovered and the pair went on to discuss a number of aspects of Caitlyn's life, including her strained relationship with ex-wife Kris Jenner and the rest of the Kardashian clan.  

Leading lady: Fans immediately flocked to Twitter after the episode to shower praise on Caitlyn - who they deemed as both 'brave' and a 'true inspiration' 

Respect: Caitlyn shot back that she found the particular comment made by Piers disrespectful

Impressed: Clearly impressed, Piers himself had ended the show by stating: 'Bruce Jenner was one hell of a guy, but Caitlyn is one hell of a woman'

Doll: During the interview, Piers pulled out a small action figure resembling Caitlyn during her heyday as an athlete back in the 1970s

The episode showed the family going for formal media training for the first time.

But Kris told daughter Kim: 'I don't want to do it. I don't want to be on the defensive about us or about Caitlyn... I am enjoying private life to be private, more off-camera when we're not doing our show.'

Later in the show the staff at Clarity Media Group grilled Kris about her 24 year marriage to Caitlyn, and asked her if she had 'turned a blind eye' to her spouse's gender identity issues.

Kris replied: 'No... I just think I didn't have the whole truth of what was going on in his life.' Kendall jumped to her mother's defence, saying: 'We kept a lot of it from you.'

Kris claimed her children had been 'told not to' repeat certain things to her.

Conceded: Piers conceded that he understood why Caitlyn took exception to his remark

Conceded: Piers conceded that he understood why Caitlyn took exception to his remark

She added: 'There were things that happened that they did not tell me. I would do anything for my kids. Had I known any of the things they were experiencing ... it just broke my heart.'

Speaking about Caitlyn's claims in her memoir, Kris said there were 'two truths,' adding that for 'more than half the marriage it was like... perfect.'

And of Caitlyn coming out as transgender, she said: 'I wouldn't have seen that truth in, like, a gazillion years.'

Kris admitted she thought Caitlyn's book was 'very mean-spirited'.

Celebrated: Caitlyn, pictured as Bruce Jenner in 1975, was a celebrated heptathlete during her younger years of competing on behalf of her native US

Celebrated: Caitlyn, pictured as Bruce Jenner in 1975, was a celebrated heptathlete during her younger years of competing on behalf of her native US

She added that there were 'a lot of inaccuracies,' and that she wished Caitlyn had simply written, 'Married to her. Didn't work out. She's a great girl.'

Kris's frank comments come after Caitlyn accused the Kardashian family of 'bashing' her.

The TV personality slammed her ex-wife Kris and her famous family, claiming that her step-children, Kourtney, Kim, Khloe, and Rob have pushed her out of their lives.

Piers Morgan's Life Stories will air on Thursday at 9pm on ITV. 

The ex factor: Before announcing her transition, Caitlyn was married to Kris Jenner. They're pictured together in 2012

The ex factor: Before announcing her transition, Caitlyn was married to Kris Jenner. They're pictured together in 2012

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