The Dragon Ruby Series — Leilani Love

From Book 1: Violca Grey knows life can change instantly. Two years after her parents' sudden death, Violca is left raising her four younger sisters. She doesn't realize that their lives are all in danger from something that may not be human.

Chase Reed knows the Grey sisters possibly hold the key to his fate. He is determined to get close, protect them and bring them to his Dragon King.

Together, Chase and Violca not only have to protect their families -- they also have to fight against their rising feelings for each other. But what Violca doesn't know is that once a dragon decides he wants something, there is no stopping him from getting it.