She told Seventeen magazine: “Hopefully it won't taint it and people will still be able to enjoy the movie.”
Robert - who plays heartthrob vampire Edward Cullen in the 'Twilight Saga' franchise – recently revealed he improvised for the sex screens with Kristen, who stars as Bella Swan, in both 'Breaking Dawn' films but was so impressed with his moves that he would love to direct one of his own.
Robert explained: "I haven't even seen the scene and I feel like I did half of it by myself. The only thing I really remember is doing the thing on her clothes [pulling down her zipper] which was my idea, of course it was my idea.
"If you notice the little thing ... we kind of end up at the top [of the bed] and that was my idea as well because we made a little rig for it and that was my idea.
"I should be a director, just for sex scenes. Other than that I just remember staring into the camera and trying to make sexy faces and I don't think it got in the movie."