Impossible Mates

Savannah Wilson, your typical normal girl, well as normal as a werewolf can be. She soon finds out her typically normal life, is about to get turned upside down. Her older brother Ryan, just packs up and leaves once he turns 16, she doesn't know the reason for his sudden urge to leave town, she misses him but decides to try and put him at the back of her mind.
But when he returns a few days before her sixteenth birthday, she learns something that will change everything, even the way she views her "family"