What could be going on? Rob Kardardashian calls Kim K a bitch... ouch

Rob, the son of Kris Jenner and the late Robert Kardashian, made a disturbing Instagram post on Sunday where he drew a parallel between his sister Kim, 34, and the cunning villain of the 2014 drama Gone Girl, played by Rosamund Pike.

'This is my sister Kim, the b**** from Gone Girl,' the 28-year-old E! star wrote in his caption.

I wonder what is up with this two, they seem close before hmmm what could have happened.  though reports has it that Rob and Kim have fallen out over her wedding to Kanye West last summer

See a pic of therm together after the cut