The Newest Cullen

Avery, a young girl from Canada, decideds to vacation to Forks, Washington to visit some family. But havoc strikes as Avery's only family get killed by someone, or something... Devastated, Avery escapes to camp out, quite close too the Cullen's home where they hear the attacker strike again.
This time the attacker doesn't finish though, as the cullens quickly inject her.
So now they have two problems:
A newborn vampire.
and a loose killer.
Furthermore, an impossible imprint, changing lives, love, people and testing everything to be tested as the Cullens newest member experiences all the chaos with them