Actor Robert Pattinson wants to talk to director Rupert Sanders about what happened during his affair with girlfriend Kristen Stewart.

The 'Twilight Saga' actor is reportedly curious to know details of his girlfriend and co-star in the vampire films cheating on him with her 'Snow White and the Huntsman' director.

Devastated Robert moved out of the Los Angeles home he once shared with Kristen on Thursday (26.07.12) after photos were released late on Tuesday night revealing that Kristen, 22, had an affair with the married motion picture boss, 41.

A source close to Robert told a media website: "Rob wants to have a man to man chat with Rupert to find out exactly what happened between him and Kristen.

"Kristen has already betrayed his trust by cheating, so he can't be sure that she will tell him exactly what went on between her and Rupert. Rupert has a wife and a family to save, so Rob feels like he has nothing left to lose and would be honest with him."

The insider went on to reveal that Robert feels doubly betrayed because he trusted Rupert as the director of Kristen's film and had no idea the two were getting so close while he wasn't around.

The source said: "Rob really was blindsided by this and he's going through the typical stages of being cheated on. He was hurt and heartbroken, then angry and pissed off, and now he just wants answers.

"He's not ready to talk with Kristen, it's too painful, so he's going to Rupert."