Rob Kardashian feels his sister Kim is two-faced at times Credit: Jason LaVeris/Getty Images

Rob Kardashian shocked everyone when he compared his famous sister Kim Kardashian to Rosamund Pike’s murderous sociopath character in Gone Girl on Instagram last week, but sources close to the E! family reveal exclusively to Us Weekly that the Arthur George creator lashed out at Kim because he feels she’s two-faced.

“Rob is in a dark place,” an insider explains to Us of the bizarre Instagram post, which read, “This is my sister kim, the bitch from Gone Girl,” alongside a blood-spattered image of the actress.

“Kim told him he needs to get out of his funk,” the insider explains, adding that the post came after Kris Jenner’s only son, 28, filmed a scene with Kim for Keeping Up With the Kardashians.

Rob, who is still struggling with depression and weight gain, also feels that his older sister is two-faced. “His post was about how she seems caring in public, but he feels ignored,” a second source says.

But, according to another source, it’s simply “not Kim’s personality to nurture. She loves him, but she’s direct.”