According to Milchan, Brad was infatuated with Angelina IMMEDIATELY after she was cast in Mr. and Mrs. Smith…and that soon grew into love.
Here's what Milchan says about it in his book:
"At first, Jen didn't believe he was involved with Angelina. She started asking around but no one would tell her anything because they were loyal to Brad, so she asked him point blank. He denied it."
"He eventually admitted he was in love with Angelina. Jen was furious and threw him out."
No MAJOR surprises here, and to be perfectly honest, it seems to have worked out nicely in the end for both parties. We're sure Justin Theroux is thrilled that things worked out how they did!
All's well that ends well.