K-Stew 'Frustrated By Possessive Pattinson'
Sources claim the actress is tiring of R-Pattz' jealousy...
An insider told Showbiz Spy: "Kristen loves spending time with Rob. But she sometimes wishes he'd just back off,"
They continued: "When he visits her on set, he's always by Kristen's side - and it annoys her. She's a very independent woman and is used to spending time alone. She's getting frustrated."
R-Pattz is also said to be jealous of Stewart's sexy scenes in new movie, On The Road and is wary of her co-star Viggo Mortensen.
A source told Hollywood Life: "Her scenes are with Viggo, who is very very hot! Rob is free until filming begins on the next 'Twilight' film, so he's got all the time in the world to keep an eye on Kristen - and he will."