she will stop aging when she's 6 years old(I think.. I can't really remember correct me if I'm wrong ;) ) (physically) so she will be a teenager.. just like the boy from south America (I don't remember his name:) )
no she'll grow really fast but getting slower until he is physically about 17 so thats about 6 actual years. then she'll live forever. but she'll have to pretend she's not their daughter cuz she'l only be a год younger lol
She will be immortal. In a few years she will look like a teenager and stay that way. Just like what happened to that person alice brought over then the war was happening in braking dawn but i can't remember the guys name.