The Changeling star, who has been in a relationship with the hunky actor since the pair met on the set of Mr and Mrs Smith in 2005, said she admires his family-orientated attitude, reported Contactmusic."We've grown as a couple. A relationship is one thing when you're first together and it's exciting. But now we've been together for many years and we have the children, it becomes a different kind of love.Also read: Brad Pitt, Angelina Jolie to star together in By the Sea"It's not just being lovers and partners and friends, it's being a family man, which I love in him and feel very lucky about. My mother was a single mom and she really struggled to keep it all together," she said.The Hollywood beauty, 39, and Pitt, 50, are keen to set a good example to their six children and hope to teach them how to value relationships by treating each other properly in their family home.Also read: Actor Brad Pitt hit in the face at Maleficent premiere"One of the things we're particularly conscious of is how we treat each other in front of the children. We want to be an example of how to treat the opposite sex," she added.