Death's Release (A Supernatural Chronicles novel)

Olivie Garnier is a shy seventeen year old girl in France. Her dad left when she was four leaving her unemployed mother to provide for herself and her two daughters. Olivie was forced to get a job when she was fifteen to help the family. As Olivie gets older, she starts noticing things about herself and her mother. She notices how their reflexes seem faster and her growing fury. Shortly, her mother mysteriously vanished and left behind a creature to look after Olivie and her sister. Secrets are told and Olivie questions herself. Is her mother truly her mother...or some kind of monster?