Kristen Stewart to Do Threesome in 'On the Road'?

Watch out, Robert Pattinson; your (maybe) girlfriend kristen Stewart seems determined to keep up with you in the steamy sex scene department.

Stewart is currently filming the movie adaptation of Jack Kerouac's classic Beat Generation novel On the Road (that is, when she isn't busy locking lips with her Twilight co-star/beau), and according to Life & Style her character, Marylou (based on LuAnne Henderson, the real-life wife of Neal Cassady, referred to as Dean Moriarty in the book/film), is quite the wild child:

"Her character, 16-year-old Marylou, has a threesome with a couple of hotties, asks to watch two people have sex and brags about loving to perform oral sex."

This isn't the only big-screen offering that K-Stew will be sexing it up in: In Welcome to the Rileys, out on November 5, Stewart plays a 16-year-old lap dancer who's taken under the wing of James Gandolfini's Doug Riley character.

via CeleBuzz