Despite the first paternity test, Rob Kardashian allegedly wasn't fully convinced that Dream is his biological daughter. 

The "Keeping Up With The Kardashians" star asked for a second DNA test as he thinks that Blac Chyna has manipulated the first one.

"He's got it in his head that Chyna faked the first paternity test," a source suggested. "She's said to him many times in anger that Dream's not his baby and even though she always backtracks later, saying she was trying to hurt him, Rob's literally been having nightmares about it."

Rob and Blac Chyna have allegedly started their relationship in 2012, however, they had a rather complicated dating status. From time to time, the couple had suffered an on-and-off relationship. 

Despite their romance being always on the rocks, Blac Chyna had conceived their first child named Dream.

However, because of Kim Kardashian's brother and former lover's crazy bond, the 5-month-old baby girl has been involved in her parent's endless drama. Now, the 30-year-old reality star had demanded a new DNA test because he's not able to think clear anymore, as RadarOnline reported.

Although the American television personality believes that Dream is indeed her own daughter, he cannot trust Tyga's ex-wife anymore. Apparently, Rob has arranged his own paternity test to confirm his doubts.

Last month, it was reported that Dream inspired Rob in a lot of ways. Aside from losing weight, the "KUWTK" star has also changed his perspective in life since his daughter came out. A reliable source told that he has become healthier and happy again.

But with the issue on hand, it seems like Rob came back to old, pessimistic life he used to have.

Do you think Rob is Dream's real dad? Is Blac Chyna lying again? Let us know your thoughts in the comment box below.