Intimate Enemies by Joan Swan
She is on a quest for answers; answers that could just get her killed.
Six months after the mysterious yacht explosion that killed Cassie Christo’s mother and stepbrother, authorities still have no answers to the cause. Searching for closure, Cassie returns to her childhood home on the Pacific Coast of Baja, Mexico, where she launches her own investigation into the accident. She never expected to find an adversary in the man who had once touched her heart with kindness in her darkest moment.
Rio’s been fantasizing about reconnecting with Cassie for months. But not here and sure as hell not now. As an undercover agent with U.S. Immigration and Customs Enforcement, he’s working the biggest sting operation in all of northern Mexico, and he definitely doesn’t have time for the wild attraction he feels for Cassie.
Not only is his cover on the line, so is his heart. Because as the end of a yearlong operation draws closer, Rio knows if he tells Cassie the truth about who and what he is, it won’t only jeopardize his mission, it may result in him losing her forever. And if he doesn’t, his lies and deception could get them both killed.