Kristen Stewart Robert PattinsonKristen Stewart and Robert Pattinson are about to put their off-screen relationship to the test. New details on Breaking Dawn indicate the movie script goes beyond the book, and that means bona fide sex scenes in the fourth Twilight installment.

The scenes will be more detailed, with more sexual dialogue.

Talk about pressure. For a couple that has been notoriously camera shy, this could play out one of two ways:

It's the sexiest thing ever (fingers crossed). They're young, and they're still in that early "oooh, he's/she's so hot phase."

They haven't fared badly on screen -- fans' assessment of their on-screen chemistry only boosted rumors that they were a couple when Pattinson and Stewart were still vehemently denying it. Not to mention, this year's win at the MTV Awards for "Best Kiss" was their second, so they're halfway there.

If they're worried, the two could take a page out of the dual lives of True Blood co-stars and husband and wife Anna Paquin and Stephen Moyer. “Everybody on set now gets to see what goes on behind closed doors,” Stephen told Redbook recently. "We leave nothing to the imagination!”

They tank it. Sure, they're professional actors, but this isn't just pretending to be into someone. It's a delicate balance of being into it without betraying something many couples consider the most intimate (read private) moment of their lives. It's not hard to imagine the cameras could get in the way.

After all, it's happened to more experienced actors than the young K-Stew and R-Patz. Remember Ben Affleck and Jennifer Lopez in Gigli? They may have been so close the media dubbed them Bennifer, but they were so far apart on screen that it was painful to watch. Although fortunately, we do not remember Twilight author Stephenie Meyer using the words “it’s turkey time" anywhere in Breaking Dawn. If only we could say the same about the Gigli writers.

Of course there's a third option: Bill Condon screws it up. The director is charged with putting sex in the film to follow the storyline from the books. But he has to be careful to keep the teen audience that's made the Twilight franchise a gazillion dollars and not piss off parents. 

Which means he'll be putting even more pressure on Kristen and Rob to keep their love just chaste enough for a suitable rating.

Can these young lovers take it?

 

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