Coltons of Mustang Valley Series by Karen Whiddon

They’re both living a lieBut the passion between them is realUndercover 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... moreThey’re both living a lieBut the passion between them is realUndercover 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? less