The 36-year-old reality star said in an interview with her family for The Hollywood Reporter that Jenner tried to talk her out of marrying Humphries the night before her wedding.
"There was all this attention on the wedding, and I thought maybe it was just the pressure of the show giving me this anxiety," Kardashian recalled, referencing her family's E! series, Keeping Up with the Kardashians. "My friends told me I just had cold feet, but even the producers said, 'You don't seem happy. You don't have to go through this.'"
"The night before, my mom pulled me aside, off camera, and was like, 'This isn't for you. Why don't you go away and I'll handle it?' I felt like, if I pulled out now, everyone's going to think I just did it for the show," she explained of going through with the marriage.
"Then afterwards, people were saying, 'You have to stay married for a year,' but I physically couldn't do it," the star confessed. "When I made the decision [to divorce], everyone said it was made up for the show. Everyone really wanted to take me down."
Kardashian filed for divorce from Humphries in October 2011 after 72 days of marriage. She said in an interview with Watch What Happens Live in May that the marriage failed because she wed Humphries for the wrong reasons.
"I just thought, 'Holy [expletive] -- I'm 30 years old, I better get this together. I better get married,'" the star told host Andy Cohen.
"I think a lot of girls do go through that where they freak out thinking they're getting old and have to figure it out, all their friends are having kids. It was more of that situation," she explained. "I knew, like, honeymoon, it wasn't going to work out."
Kardashian got remarried to Kanye West in 2014, and shares 4-year-old daughter North and 20-month-old son Saint with the rapper. Keeping Up with the Kardashians will return for a 14th season in September.