Blac Chyna is reportedly mad over the fact that the Kardashian-Jenner clan are doubting that Rob Kardashian is the real father of her unborn child. Chyna allegedly told Kris Jenner that she will only get a paternity test if Khloe Kardashian will also do it to finally set the record straight if O.J. Simpson is her real dad.

“The notion that Blac cheated on Rob and conceived a baby with another man behind his back is preposterous,” the source told Hollywood Life. “It’s very insulting and a slap in the face to her. She can’t believe Kris or anyone in the Kardashian family, would think she’s that despicable.”

“Sure, she’d take a paternity test, just as long as Khloe comes with her to make sure she’s not O.J.’s daughter,” the source added. “That’s how Blac feels about this situation. She’s really heated hearing that some people think she’d betray Rob in such an evil way.”

The close relationship of Jenner and O.J. Simpson in the past appears to be suspicious to some people, plus many claimed that Khloe looks different among her siblings, making an impression that she could possibly be the daughter of O.J. Simpson and not Robert Kardashian Sr.

The closeness of Jenner and O.J. Simpson was proved when the former football player proclaimed his innocence and he desperately tried to convince her that he didn’t murder Nicole Brown Simpson back in 1994. Jenner revealed the details of their conversation when she visited him in jail.

“I talked to him while he was in jail,” Jenner told PEOPLE magazine. “He was trying to tell me he didn’t do it, and what he thought had happened. I just listened to him, to what he was saying to me.”

Even though she was also friends with O.J. Simpson, Kris Jenner didn’t quickly take his side as he might have expected because she thought that the evidence was too much for her to believe otherwise.

“I’m a very logical person,” she said.”I want to give everybody the benefit of the doubt, but the evidence was so strong. [What he said] didn’t have any effect on what I thought.”

Jenner’s late husband, Robert Kardashian was part of the NFL superstar’s defence team and they helped O.J. Simpson got acquitted of Nicole Brown and her friend, Ronald Goldman murder charges.

The highly-publicized crime was recounted in the new FX miniseries “The People vs. O.J. Simpson: American Crime Story” which aired on February 2.