Robert Pattinson wants to meet the wife of the man who had an affair with his girlfriend.
The Twilight actor wants to speak with Liberty Ross to test Kristen Stewart's claims that she and film director Rupert Sanders had just a "momentary indiscretion".
A source told the Daily Mirror newspaper: "He needs to know for his own peace of mind if theirs was just a fleeting moment.
"He hopes Liberty can help him find the answers he so desperately craves."
Stewart, 22, said at the time: "This momentary indiscretion has jeopardised the most important thing in my life, the person I love and respect the most, Rob. I love him, I love him, I'm so sorry."
However 26-year-old Pattinson is said to be unconvinced and wants to hear from the mother of 41-year-old Sander's two children.
The source added: "Nothing is very clear at the moment but perhaps a meeting would lend some clarity to the situation. He needs to know the truth."
Meanwhile, it has emerged that Steward dumped the Snow White and the Huntsman director by text message hours after their liaison was caught on camera by US Weekly magazine.
A friend, who asked not to be named, said: "After that day she texted Rupert that she never wanted to do that again because she feared being caught and that things were too intense.
"She had no intention of leaving Robert and Rupert has never mentioned walking away from his family.
"She knew she did wrong, but realised how those photos would rip out Rob's heart. She has been in floods of tears since."
"Rob and Kristen closer than ever"
It has emerged that both Pattinson's and Stewart's families were stunned by her admission that she had cheated on him.
Despite Kristen's public apology and declaration of love for her Twilight Saga co-star, the British actor - who has moved out of their Los Angeles mansion - is said to have been "indifferent" to the statement and is struggling to get to grips with the situation.
The source added to Grazia magazine: "Rob was indifferent to her statement. Kristen wrote it and she's desperately trying to make up for the fling by expressing her love for him.
"It's incredible not only would Kristen do this, but to do so in public beggars belief.
"Rob needs to get his head round it."
The Bel Ami star is said to be particularly unhappy that his agent initially broke the news of Kristen's affair, rather than her telling him herself.
Another source told Reveal magazine: "It was like a bolt out of the blue. He was on his own when he got a call from his agent and there was stunned silence as he tried to take it all in.
"When he confronted Kristen about it, she didn't try to deny anything. She was crying and kept saying, 'I'm sorry.' "
Pattinson is believed to have returned to the UK following the shock news.