Credit: Stefanie Keenan/Getty Images for MOCA

Angelina Jolie and Brad Pitt left their six children at home Saturday as they enjoyed a private viewing of The Museum of Contemporary Art's new 30th anniversary exhibition in Los Angeles.

See more photos of the couple at the art museum at!

The 34-year-old Jolie, in a strapless Armani Prive gown, and Pitt, 45, didn't pack on the PDA like they normally do for photographers.

Instead, they walked around the gallery -- occasionally leaving each other's side to look at pieces on their own.

The new Us Weekly (on newsstands now) has the exclusive first look at what's really inside a shocking new tell-all about the couple -- and reveals the truth behind some of the alleged bombshells.

Brangelina: The Untold Story of Brad Pitt and Angelina Jolie reports that "they've broken up so many times it would make your head spin." It also claims Jolie "has a temper like a cobra." The book even alleges that she even considered hiring a hit man to kill her in 1998 because she was so distraught.

Us Weekly reports that the actress, 34, still has her battles with Pitt, 45 - especially when it comes to their six children.

"They fight all the time about the kids - where to put toys, saying the wrong thing to a nanny, not cleaning up," one source tells Us Weekly. "Like cats and dogs."

For more on Jolie and Pitt - including the truth behind Pitt's "secret meetings" with Jennifer Aniston, why the tell-all claims Pitt and Jolie will split by "Christmas 2010" and details about Jolie's decision to reconcile with her father after an eight-year rift - pick up the new issue of Us Weekly today!