They're both living a lie but the passion between them is real.

Undercover FBI agent Fiona Evans is determined to bring down a deadly cult. But the cult leader's estranged son, Jake Anderson, warns her that she's in danger of being targeted. Jake can't believe he's attracted to someone who could fall for his mother's scam--until he suspects that Fiona is not what she seems. Then he discovers his secret ties to the Colton family... Can he trust anyone? Can he trust himself when the enemy chases them down?

From Harlequin Romantic Suspense: Danger. Passion. Drama.

The Coltons of Mustang Valley:
Book 1: Colton Baby Conspiracy by Marie Ferrarella
Book 2: Colton's Lethal Reunion by Tara Taylor Quinn
Book 3: Colton Family Bodyguard by Jennifer Morey
Book 4: Colton First Responder by Linda O. Johnston
Book 5: In Colton's Custody by Dana Nussio
Book 6: Colton Manhunt by Jane Godman
Book 7: Colton's Deadly Disguise by Geri Krotow
Book 8: Colton Cowboy Jeopardy by Regan Black
Book 9: Colton's Undercover Reunion by Lara Lacombe
Book 10: Deadly Colton Search by Addison Fox
Book 11: Hunting the Colton Fugitive by Colleen Thompson
Book 12: Colton's Last Stand by Karen Whiddon