Maybe she thinks Marion Cotillard is pregnant with Brad's baby, just like we do!

Angelina Jolie decided to pull the plug on her marriage to Brad Pitt just seven days ago, and she was prompted by a specific event that occurred, Us Weekly reports.

"The final divorce decision was only made one week ago. An incident took place and prompted [Angelina] to act and file," a source dished to the mag. This just reeks of an affair!

Page Six is reporting that the mother-of-six suspected her husband was being unfaithful with his Allies co-star Cotillard, so she put a PI on the case! "She hired a private eye because she felt that he was fooling around with her on the set, and it turns out, he was. And that was the final straw," a source told the outlet.

It can't be easy making the call to breakup your family, but Angie "feels like a weight has been lifted" now that she's taken the steps to dissolve their union.

"This has been coming for some time. This is a very difficult period for the family. It was such a difficult decision and it was so hard for her to make. Now that she has made it she knows it was the right thing," another source explained to Us Weekly.

We still can't believe Brangelina is dunzo!