hes a deamon prince, and my soul mate...WTF

Cat, is normal, well as normal as teen girls get. but then she finds her soul mate, Lucifer, and hes a daemon, GREAT! NOT!! oh, and top that off hes a prince that's supposed to command the army that will destroy all of heaven and take over the human race, OH! and forgot to mention she finds out that she is part angel and supposed to fight for the other side.....but their love is strong, and not even heaven or hell can change the spark they feel. now they just need to survive.