Kris Jenner thought her daughter Kim Kardashian was just ''going through a phase'' when she married Damon Thomas and didn't realised she had actually wed.
The reality TV star secretly tied the knot with the music producer, who is 10 years her senior, in 2000 when she was just 19 and while Kris knew her daughter was acting differently, she never thought Kim - who divorced Damon in 2004 - would marry without telling her.
She said: "Kim seemed to be going through a phase. At first I wasn't sure what was going on. She had started dating an older man named Damon and was acting really funny.
"It just got even odder when she pulled up to my house out of the blue in a Brand New Jaguar. How did she buy that without my help, I thought.
"[When I discovered they were married] I didn't like it but I realised I would have to learn to live with it. I had to see it through with her because I'm her mother. I had always told her that my job was to be there for her through thick and thin."
Kris also revealed how she and Kim - who recently filed her divorce from Kris Humphries after 72 days of marriage - "cried for days" when a sex tape featuring the socialite and former boyfriend Ray J was released in 2007.
In an extract of her new book 'Kris Jenner... And All Things Kardashian' published in The Sun newspaper, she explained: "It was everywhere. Forever. And the production company was planning to release the tape globally. It was a horrible time for our family.
"That kind of thing is devastating, embarrassing, expensive and draining. Kim and I cried for days."