At first following her mothers death while she was pregnant with her two twins, Angelina Jolie decided to to take part in an action movie so as to relief herself of the stress and grief associated to her mothers death. At that time that is what she said
here
Apparently I think she found that interesting and so she now decided to make one more movie but this time
Angelina Jolie want her children to be proud of her. She says that by watching Tombraider 2 her children will know that yes - it possible to do anything you want to do in life. Sounds fair?