I don't think anyone would deny Jolie has naturally full lips...particularly her bottom lip. And of course make-up/angle has a lot to do with it in pictures. That doesn't mean she doesn't have them augmented at times (maybe not all the time).
As to her not caring enough to do it...she grew up w/a famous father, rich, her appearance is/was her bread and butter...I doubt it's something she would have anything against doing, if the mood struck her, like with her tatoos supposedly giving her confidence or something. "
http://www.lipaugmentation.com/angelina_jolie_lips.htm
(this site has a lot of before/after pics that shows how good lip augmentation results can often - but not always - be)
Only she knows for sure, but..... :cool: