It's no secret Rob Kardashian and his sister Kim Kardashian have a rocky relationship, but things just got really hostile!
Rob posted a photo on his Instagram page on Sunday of the psycho killer character Amy Dunne from Gone Girl. "This is my sister Kim, the bitch from Gone Girl," Rob captioned the pic.
He also stopped following everyone, including his own family.
Earlier this week Kim wished Rob a happy birthday on Instagram saying, "I love you so much and can't wait to share so many more memories with you!"