The 36-year-old mother-of-six had already adopted oldest son Maddox, 10, before she got together with Brad in 2005, but insists that until then, she only wanted a couple of kids. She said: "At first I was thinking of adopting two children, but I wasn`t sure.
"I knew I didn`t want to raise a large family on my own but when Brad came into my life and I came to know him, I discovered that he loved being a father and wanted to build a family with me. I didn`t plan on having twins either!"
In addition to Maddox, the couple - who met on the set of `Mr. and Mrs. Smith` while Brad, 48, was still married to Jennifer Aniston - also have adopted kids Pax, eight, and Zahara, seven, as well as biological daughter Shiloh, five, and three-year-old twins Knox and Vivienne.
And Angelina admits she falls deeper in love with the `Moneyball` actor every time she sees him with their children.
She told OK! magazine: "When we first met I appreciated how caring, sexy and how great a friend he was to me.
"But I also fell in love with the man who was a very loving father and how much he enjoys spending time with the children.
"When I see how much love is in Brad`s eyes for the twins and for all our children, it`s a very moving experience for me. When I see him with the children it makes me love him even more."