Article continues below advertisementKris Jenner kept her lips sealed while her daughters Kim and Khloé Kardashian joked about one of the family's most infamous rumors - that O.J. Simpson is Khloé's real father.The moment played out on the latest episode of The Kardashians, which dropped on Thursday, November 20. Kim surprised Khloé with their late father Robert Kardashian Sr.'s bible, a gift Robert once gave to O.J. back in 1994 during the former NFL star's murder trial.Article continues below advertisementSource: MEGAKris Jenner stayed silent while her daughters joked about O.J.