Ray J is threatening to take Kris Jenner to court for denying she was behind the leak of Kim Kardashian's infamous 2002 sex tape.
The 41-year-old singer, real name Ray Norwood, previously accused Kris of "masterminding" the ordeal that launched Kim's stratospheric rise to fame.
But this week the business mogul, 66, took part in a lie detector test while appearing on The Late Late Show with James Corden with her daughter Kylie Jenner.