Secrets about Robert Pattinson & Kristen Stewart’s honeymoon scene

45970, BEVERLY HILLS, CALIFORNIA - Sunday October 10, 2010. Robert Pattinson and Kristen Stewart have a good laugh with a friend while sitting in the backseat of a taxi. The Twilight Saga couple had spent their evening eating sushi at Matsuhisa restaurant in Beverly Hills. Photograph:  Anthony, PacificCoastNews.com

Secrets about Robert Pattinson and Kristen Stewart’s honeymoon scene in Twilight Breaking Dawn have been revealed.

Apparently, Robert Pattinson has been spotted on a Louisiana river learning how to drive a speed boat.

An eyewitness told HollywoodLife.com that Rob was on a river in Baton Rouge early in the morning, driving a “speed boat” with an instructor. They were told by another source that he was followed by a rescue boat with certified scuba divers — just in case.

In other Twilight cast news, apparently Ashley Greene’s boyfriend Joe Jonas is getting worried about her love scenes with Jackson Jackson Rathbone.

Ashley and Jackson play Alice and Jasper in the Twilight flicks, and the couple lock lips. Well according to Hollywoodlife.com, Joe isn’t happy.

An on-set insider told them: “Joe isn’t happy with Jackson kissing Ashley,”

“He knows it’s a film, but these scenes are really hot and heavy. And, Joe is more of a singer than an actor, so this is all new to him.”

“Joe is very possessive of Ashley — letting everyone know that she belongs to him –- especially [when it comes to] Jackson.”

“It was a totally different atmosphere on the set when no one was dating anyone,” the source added.