A close friend tells British newspaper the Sunday Express: "If Brad wants to keep hold of his family, he is going to have to learn to be careful about how he treats Angie.

"She is not the home-body he is and wants the kids to grow up as 'citizens of the world', speaking several languages and with a broad perspective on life.

"She hates the idea of them growing up in the insular world of Hollywood as the spoilt brats of movie stars who expect everything to be handed to them on a plate."

Meanwhile, Pagesix.com spies on the Warner Bros. lot in Los Angeles say Pitt, on site filming "Ocean's 13," drops off Maddox and Zahara, his two adopted children with Angelina Jolie, at the studio's day-care center every day.

"The day care is available to anybody working on the lot, including secretaries and executives," said Pagesix.com's source. But, "The workers at the day-care center are very protective of Brad and won't let any of the other parents approach him or talk to him."