Blood Bound. Blackhawk Security, #2

Right place, right time. When Rylie Hart adopts her best friend's daughter, in the wake of the woman's untimely death, she goes from being an honorary aunt to a mother in the blink of an eye. Two years later, after kindergartner Mickey is diagnosed with leukemia, an anonymous donor is her only hope. Retired Marine Raider and current Blackhawk Security CEO, Chase Dixon finds himself in a position to give someone the gift of life.
Twelve months later, he gets to meet the little girl he saved, and not only does she instantly steal his heart, but so does her mother. After Rylie receives legal documents contesting Mickey's adoption, she discovers the secret her friend took to the grave. Once again, she finds herself fighting for her daughter's life. Will Chase be able to come to their rescue one more time? Or will Rylie lose her little girl and the man she's falling in love with?