The Sheriff (Harlequin Intrigue Series #1541)

TEXAS-STYLE PROTECTION  

Sheriff Pete Morrison knew the the secret in his past could destroy his father. Yet instead of resigning his job and exposing the lie, he found himself protecting Andrea Allen—a beautiful astronomer who witnessed a gun-smuggling operation and a college student's abduction. Determined to be independent, a relationship with her conflicted protector isn't in the cards. No matter how safe she feels in Pete's strong arms. But when things take a turn for the worse and Andrea exchanges herself for the abducted student, only Pete can save her from the horrible fate that awaits her.