Once Upon A Destiny

Enter Christabel Waters and Justin Robertson, a geek and nerd who have known no one but each other for eight years - they are siblings, best friends and lovers, who have had the most perfectly normal lives ever.
Enter Reese and Zinnia. Two Hunters of the Dark, whose lives are bound to finding more Hunters, completing Quests from the Eternal Home and killing demons before they can take over the world.
When Chrissy finds out she is a Hunter - and Justin is not! - she watches in despair as the truth unfolds before her and both worlds merge into one - but there is a problem. There is no space for her Justin in her new world, and she must compromise her love or future to take on her Destiny and save the Eternal Home.