It's In The Blood (Book 1). It's In The Blood, #1

BOOK1   The Thirst WithinBook One of the "It's In The Blood" SeriesHe has his mother's heart... and a predator's soul. Corina Sanchez thought the nightmares of her childhood were over. She has a devoted husband, a quiet home, and a beautiful young son, Malachi. But as Malachi grows, Corina realizes he is carrying a genetic legacy she can no longer hide-one that makes him ice-cold to the touch and fundamentally different from every other child.
Malachi is a loving, gentle soul, but he is trapped inside a body with a biological "thirst" that cannot be denied. As he discovers the truth of what he is, he must battle the instinct to hunt while clinging to the humanity his mother taught him to cherish. In a world that fears the "other, " Corina and Malachi must navigate a dangerous path. When a tragic accident threatens to expose their secret, Corina is forced to protect her son from a society that would see him only as a monster-even as Malachi struggles to prove that love is stronger than blood.
The Thirst Within is a gripping Urban Fantasy that explores the thin line between the monsters we are born as and the people we choose to become.