Kris Jenner is said to be in the dark about exactly what Bruce Jenner will reveal in the much-anticipated interview with Diane Sawyer and reportedly ''flipped'' about interview

The former Olympian's sit-down chat with Diane Sawyer - which is expected to cover his transition to a woman - is due to air on ABC on Friday (24.04.15) and his ex-wife is said to be so concerned about what he will reveal, she tried to ''talk him out'' of the appearance.

A source told the New York Daily News' Confidenti@l column: ''Kris is so nervous about the tell-all that she tried to talk the former Olympian out of doing it. ''Initially, she was really upset about it; the fact that he was going to address anything publicly.

''So the momager part of her, was like, 'Hell, no.' Bruce has never been allowed to say anything. For him this is an 'Eff you -- this is my life!' moment.''

According to TMZ, Kris ''flipped'' when Bruce confirmed he was doing the interview because she was worried he would embarrass the family, especially their teenage daughters Kendall and Kylie. The source said: ''The older ones [Kris' daughters Kourtney, Kim and Khloe Kardashian] can handle it.

''She said that it could damage Kendall and Kylie's careers. She said he was being selfish. At first she told him, 'You better not do it.' ''

Meanwhile, pictures have emerged of Bruce wearing a long dress outside his Malibu home. The New York Daily News newspaper obtained the images, which appear to show the 'Keeping Up with the Kardashians' star in a black and white striped gown, smoking a cigarette.