kris jenner getty Kris Jenner pushed Kim Kardashian's sis Khloe to get DNA test“Keeping Up with the Kardashians” returns for its seventh (yes, seventh!) season on Sunday (May 20), and it looks like viewers will finally have an answer to the not-so-burning question, Is Khloe Kardashian really a Kardashian?

Khloe’s paternity has been a hot topic for awhile, especially now that her mom, Kris Jenner, has a book to sell. In the tome, “Kris Jenner and All Things Kardashian,” Kris reveals some lurid details about an affair she had while married to her famous daughters’ father, Robert Kardashian.

“His name was Ryan, and he was a producer,” Kris writes. “We had wild sex everywhere, all the time.”

Yeah, we just threw up a little too.

The affair apparently occurred around the time Kris got pregnant with Khloe. Kris encouraged Khloe to get a DNA test on the season finale of “Khloe & Lamar,” but Khloe was opposed to the idea. But apparently she warmed up to it in time for shooting “Keeping Up with the Kardashians,” as the K sisters tease that we’ll find out if Robert is really Khloe’s father on Sunday’s premiere.

Check out the clip of the gals on “The Tonight Show with Jay Leno” Monday.

Do you think there’s any chance Khloe’s a legit Kardashian?

Posted by:Jennifer Harper