Descendant

She’d survived change. She’d survived heartbreak. Now she has to survive one more fight for survival.

Ava Delaney was normal once upon a time, but then she met a boy and she fell in love. Then she kept his secret and fell into his world. She became one of them. And now... now it's time to face the evil that’s coming for her. 

Twin brothers, one good and one evil, will do whatever it takes to keep her safe.