Memories

Jessica-or Jess as her sister Gina calls her is the quiet one, the one that stays out of trouble. Gina is the trouble maker.
But when Jess gets into a car accident on the way to her sister's wedding and wakes up six months later unable to remember anything, trouble finds Jess. Throw in a handsome high school bunker, werewolves intent on kicking both of them out and a step mother who plans to see them both married to guys they hate, Jess's life become anything but simple.
To add to her list, she finds out she didn't spend those six months in a coma. What exactly happened and why?