According to People, Robert is reportedly "heartbroken and angry." Who can blame him? His girlfriend cheated on him with a guy who directs Nike commercials.
Additionally, the New York Post reports that "witnesses saw Rob and Kristen fighting backstage at the Teen Choice Awards in Los Angeles on Sunday, just days after the 22-year-old actress and Sanders, 41, were pictured sharing a steamy rendezvous."
Sounds like KStew broke the news to him prior to the award show or during knowing that the pictures were going to go public.
