How strange that you think that. I think she's just as beautiful today, I'll bet if she had something to smile about you would see that beauty. What is so tragic is that the pain you see in the teenage face has been intensified in the adult. I can't even imagine how bad her life must have been.
I heard that when the photographer took the first picture, she was in a school room, her parents had recently been killed, and she was basically suffering from what I'd call shellshock, hence the frightened, wide-open eyes.
She's still pretty. She has obviously gained some weight, so her face has filled out considerably, but that's her, and she's still pretty.
And I've always thought the Afghans were basically attractive people. They and the Iranians are better looking than the Pakistanis and Arabs, IMHO.