Just a note on Trying Times! For anyone who is unaware it is a sequel or who is still confused where Bella, Edward and everyone else is.
I first wrote the story Nessie Learns a Lesson, which really should be read first to fully comprehend Trying Times.
An extreamly short summary is:
Nessie has gotten into a lot of trouble at school and is eventually explelled (You'll have to read the story to find out why :-)
Alice asked Bella and Edward to consider sending Nessie to live with her and Jasper (they already had plans to move away from the family for a while) to give her time to sort herself out away from the rest of the family (especially her mind reading dad!)
They reluctantly agree, not having a better solution.
(You also get to read of what happens when they're in Canada (before Jenny)
So that is why Alice and Jasper (and Nessie) are the only Cullens mentioned - the others are living elsewhere.
You really should READ NESSIE LEARNS A LESSON though to get the whole picture