Luck of the Devil

Luck of the Devil (Speak of the Devil, Book 1) by Patricia Eimer

Being the youngest daughter of the Devil isn''t all it''s cracked up to be. The days of teenage rebellion and vows of chastity made just to tick off her father are over, and now all Faith Bettincourt wants is a nice, quiet life. Unfortunately, thanks to the unexpected arrival of her demonically-downsized sister, a ditzy succubus roomm...