Khloe Kardashian Odom is furious with her father's ex-wives for claiming she was adopted.

The reality TV star lashed out on Twitter after Jan Ashley and Ellen Kardashian, the women who married Robert Kardashian after he split with Kris Jenner, told Star Magazine that she is not the lawyer's biological daughter.

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 wrote in two tweets on Wednesday.

Jan Ashley and Ellen Kardashian, both 63, told the tabloid that Robert confided in them about his wife's affairs.

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

Ellen Kardashian also told Star she was suspicious about Khloe's paternity. She dated Robert for nearly six years and married him two months before his death.

Khloe brought it up all the time, she said. 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.

Kris Jenner admitted in her new memoir that she cheated on her husband, telling Jay Leno on the Tonight show it was the biggest regret of her life. Ellen told Star that Robert not only knew about her affairs, but he wasn't sleeping with his wife the time Khloe was conceived.

[But] he never would have considered a DNA test. He loved her very much, Ellen said.