Rumors of a feud between the Kardashian siblings started when Rob bailed on Kim's wedding to Kanye West
, leaving Italy before the ceremony took place. The younger Kardashian brother then posted a cryptic Instagram photo in March, comparing his recently-blonde sister to "the bitch from Gone Girl
." Most recently, on an episode of Keeping Up With the Kardashians
, Kim put her foot down, calling her brother "pathetic"
and pleading with family members to stop catering to his behavior.