The 59-year-old television personality discussed the teenager's procedures in an interview with Access Hollywood on Wednesday. Kylie admitted to plumping her pout after months of speculation in May, and Kris said she's learned to accept her daughter's decision.
"I get a little crazy," the momager shared. "And I think that's what no one sees, is that I do have definite thoughts and ideas of what she should do at a really young age. I'm from the generation that in my day, some of this stuff didn't exist for sure. But I don't think I did one thing physically to myself until I was in my 50s."
"So I'm thinking, 'Why, why, why do you need to do that?'" she recalled. "I got really upset. Then it was done and I had to let it go. I wasn't completely supportive, believe me, but once that was done, she's my kid. We make mistakes."
Kylie, who turned 18 years old in August, told the New York Times this month she still does Juvederm on her lips. The teenager confessed to being insecure about her lips when she admitted to the fillers, but often highlights her pout on Instagram since starting the procedures.
Kris, Kylie and their family came to came on E! series Keeping Up with the Kardashians, which will return from mid-season break Sept. 20. Kylie also oversees various fashion ventures with her sister, Kendall Jenner, in addition to her popular website.