R-Pattz Wants 'Man-To-Man Chat' With Sanders
But the Twilight star is still 'not ready' to talk to Kristen...
The Twilight star is said to be "devastated" over the news that girlfriend K-Stew had enjoyed a secret fling with Sanders, director of Snow White and the Huntsman.
And while he is reportedly still "not ready" to talk to Kristen, according to US reports, R-Pattz is keen to get some answers from Sanders.
American gossip website Radar Online quoted a source as saying: "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 also claims that Pattinson feels "doubly betrayed" by the movie director and was "blindsided" by the shock revelation.
"He was hurt and heartbroken, then angry and p****d off, and now he just wants answers," the US gossip said.
"He feels like he needs to know exactly what happened, how far it went and how many times, so he can figure out if this is something he can move past.
"He's not ready to talk with Kristen, it's too painful, so he's going to Rupert."
Since news of Stewart and Sanders' fling broke, Pattinson has reportedly moved out of the home he shared with his on and off screen love.
But the pair could be forced to endure an awkward reunion at the premiere of Breaking Dawn - Part 2 later this year.
Today's Sun newspaper suggests R-Pattz and K-Stew have been told they must attend the November premiere.
A source told the paper: "R-Pattz is in pieces but the Twilight love triangle storyline is nothing without him and Kristen.
"It is eating him up that he has no choice but to see her again because of work. His humiliation is total."
Both Kristen and Rupert Sanders have issued public apologies in the wake of the affair.