Robert Kardashian swore that Khloe is in fact his biological daughter, dismissing all claims by his ex-wives that Khloe was fathered by another man.

When Robert was seeking to have his 2nd marriage annulled from Jan Ashley in 1999, he submitted a declaration to the judge stating that the marriage did not work because Jan wanted to have his child, but he did not.

In the declaration, Robert says, "I decided that since I already had four biological children, I did not wish to have any more."

Jan just told a tabloid that Robert had privately confessed to her he was not Khloe's biological dad but that seems to fly in the face of Robert's own declaration.
 

Check out the documents obtained by TMZ here.