I suggest that your mother be persistent. The bird hasn't had alot of time to adjust, it's probably just coping that way.
We had adopted a bird who's last owners accidentally injured it, and didn't know. They had the bird for a few more months, but since the accident, it wouldn't allow them to touch it. When my mom brought it home, and discovered the injury, she began massaging the wing until the bird realized it was no longer hurt, and thus no longer tried to injure my mother or run away when she took the bird out.
Kind of the same thing. Continue trying your hardest to get the bird attached to you. Feed it some pasta, I've never had a bird that didn't like pasta. (Not too much though, don't want a birdaloon). If it's biting her, GENTLY towel it, coax it over with some feed, talk softly to it.
All you can do is be persistent until the bird realizes that no one is going to hurt it.
As per the answer above, I don't mean to sound rude, but our birds were all addicted to shiny things like that... Kind of weird to me that a bird might be afraid of those. Birds love shiny.
I can't count all the birds I've had...