Reality TV star Kim Kardashian West reportedly went "ballistic" at husband Kanye West when she found him looking at images of his former girlfriend Amber Rose.The "Keeping Up With The Kardashians" beauty, who is expecting her second child with the "Bound 2" rapper, was fuming when she found old photographs of Rose on his computer, reports femalefirst.co.uk."Kim found Kanye looking at Amber39s Instagram page and went ballistic. It39s really damaged her confidence. He told her she was being ridiculous. She then went to his computer and found he still had old intimate pictures and videos from their relationship."Kim was sobbing and confronted Kanye, telling him he had betrayed her, but he reassured her none of it was a big deal," a source told Closer magazine.Kim, who is also the mother of two-year-old daughter North, is believed to be feeling even more insecure about her changing body shape as a result of her pregnancy."She feels insecure about her changing body and hates seeing Amber parading her amazing figure. She has told friends she sometimes feels like Amber is the third woman in their marriage and just wants something to be done to erase her out of their lives," the source added.