Caitlyn Jenner has said she didn't trust Kim Kardashian and Kris Jenner when it came to her gender reassignment surgery.
The former Olympic champion, who was previously married to the family's matriarch Kris, has also said she does not communicate with stepchildren Kim, Khloe, Kourtney and Rob Kardashian anymore.
Jenner, 68, told Piers Morgan's Life Stories that, when she sent a copy of her memoir, The Secrets Of My Life to Kim before publication, it did not include the last few pages in which she "talked about gender confirmation".
Morgan asked: "They didn't know that you had actually had the surgery?"
On whether her gender transition was the business of her ex-wife and the family, 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. I had already been living as Caitlyn for a year and a half, OK, nobody knows anything."
Asked by Morgan if specifically keeping the revealing portion of the book away from the Kardashians was "willfully deceptive", Jenner said: "Because I didn't want them to leak it to the press. And there was no reason for them to know about it."
Jenner said: "Of course I didn't trust them, yeah."
Jenner, who first came out as a trans woman nearly three years ago, said that her two children with Kris – Kendall and Kylie – speak to her "all the time, every day".
But her relationship between her ex-wife and stepdaughters in particular has dwindled. "It's not even a problem, I just don't communicate with them like I used to," she said. "Well, it hurts but it's not the end of the world. Fortunately I have a lot of children."
Jenner, who has six biological children from three marriages, said: "Yeah, I really don't talk to them anymore. The only ones I'm really concerned about are Kendall and Kylie, yeah they are biological kids. Although the Kardashians, I spent 23 years of my life carpooling those kids around, raising them, taking care of them."
Piers Morgan's Life Stories: Caitlyn Jenner airs on Thursday at 9pm on ITV