The Billionaire's Son (The Rookie Files)

Rookie cop Kelly Jenkins rescues a terrified young boy from his abductors, but the incident becomes far more complicated when the kidnappers remain at large and the child becomes attached to her, calling her "mommy." Kelly finds herself drawn into a world of wealth and privilege she never expected to enter. Trey Wentworth, the boy's father, is a billionaire whom Kelly finds arrogant and difficult—a stark contrast to her working-class background. As threats against both Trey and Kelly escalate, an attraction develops between them despite their differences. Staying to protect the child and Trey becomes necessary for their safety, but Kelly worries that prolonging her time in this unfamiliar world of privilege may cost her her sense of self and her heart.