Why Robert Pattinson has nothing to say about Kristen Stewart affair

Updated: Jul 26, 2012, 18:35 PM IST

Washington: Robert Pattinson is ``heartbroken and humiliated`` after girlfriend Kristen Stewart cheated on him with married ‘Snow White’ director Rupert Sanders.

Sources told New York Post that the 26-year-old actor was stunned when he discovered his partner of four years had been caught kissing Sanders - who she worked with on `Snow White and the Huntsman` - and said that he is struggling to cope with the news, Contactmusic reported.

One source - who saw Pattinson and Stewart fighting backstage at the Teen Choice Awards in Los Angeles on Sunday - said: ``Rob and Kristen were having a long and intense conversation backstage, and he looked miserable, heartbroken and humiliated. She was pleading.``

“Rob is deeply in love with Kristen and is very jealous when other men hit on her. This will crush him,” another source said.

After pictures emerged of the Twilight actress and the father of two kissing the 22-year-old issued a statement saying how sorry she was.