Her Secret Family — Sherry Lewis

Behind every code of silence...
Detective Jolene Preston has the right to expect backup from her partner, but the sexist attitude from the rest of the force is something the narcotic squad's lone woman fights on her own. Until she discovers a thirty-year cover-up, exposing her Cherokee heritage -- and a prejudice she can't take on alone.

...lies a multitude of sins
Mason Blackfox grudgingly helps the rookie trace her family history because he knows personally that lies cause only hurt. But then his own daughter demands to know the truth about her grandparents, and Mason needs the lady cop. She's the only one who can possibly understand.