Mr. & Mrs. Smith Director Doug Liman fears the sex scenes between Brad Pitt and Angelina Jolie in new movie are so realistic, that fans of Pitt's estranged wife Jennifer Aniston will boycott the film.

According to the report, Doug said that producer Dave Matalon had given him prior warnings while shooting the steamy scenes between the couple, who are said to be real-life lovers.

"I don't want to lose that audience of people who are huge Jennifer Aniston fans, who are going to hate Angelina Jolie if the sex scene's too sexy. "People will see the sex scene and say, 'Oh, that's how Angie did it'. It'll be like, 'She used her wiles to seduce him'," the Mirror quoted the producer as telling Doug.

Doug reportedly also revealed that he was stunned at how steamy Tomb Raider star Angelina, 29, was prepared to make the bedroom scenes.

He said, "I suggested she should perform the most graphic, crazy sex act I could imagine for the love scene just to try to shock her. Like 10 steps beyond anything I'd consider doing in my own life.

"She starts furrowing her eyebrows. I'm like, 'Oh, never heard of that one?' She's like, 'No, actually I'm just trying to figure out whether I've done that one'."he added.