In a promo clip for the upcoming season of Keeping Up With The Kardashians, Kim, 34, can be seen raging: "I'm not buying her a fking pair of shoes, I bought her a fking career!"
Following the release of the clip, some have suggested Kim is resentful of 18-year-old Kendall's success in the fashion industry.
But she told the MailOnline: "That was not about Kendall. It hurt me when people thought I would say that about her."
While Kim admitted she was talking about another of her sisters, she wouldn't give much away.
She added: "Kourtney was being a little difficult with me. You'll see."
Kim added that, even thought her husband Kanye, 37, has helped Kendall in her modelling career, there is no resentment.
She said: "I'm her biggest cheerleader – we talk all the time.
"She does ask Kanye for advice and I do think he has been influential in helping her and guiding her with decisions.
"We're family, that's what we are here for."