Khloe Kardashian

Khloe Kardashian — notorious for speaking her mind — isn't holding back when it comes to her late father Robert Kardashian's other wives and their claims that she isn't really a Kardashian.

Jan Ashley, the woman who married Robert Kardashian after he split from Kris Jenner, recently told Star Magazine that Khloe was not Robert's biological daughter.

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"Khloe is not his kid -- he told me that after we got married," said Ashley, 63. "He just kind of looked at me and said [it] like it was a matter of fact. He said, 'Well, you know that Khloe's not really a Kardashian, don't you?' And I said...'OK,' and that was it."

Ellen Kardashian, 63, who was married to Robert at the time of his death in 2003, backed up Ashley's claims. "Khloe brought it up all the time," she says. "She looked nothing like the rest. She was tall, had a different shape, light hair, curly hair. Didn't look anything like the other three children."

Check out photos of Khloe Kardashian

Khloe fired back at the women on Twitter Wednesday, writing, "The audacity you have to mention my father's name like this! Should be ashamed of urself! I let a lot of things slide but this one is really low. YOU ARE DISGUSTING! (yes you know who YOU are)."

Khloe's mother, Kris Jenner, slammed the rumors on Thursday's Good Morning America, calling the claims "crap." She what Jenner had to say here:

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What do you think about Jan Ashley and Ellen Kardashian's claims?