Twisted Freedom by J. Grayland

After battling to escape the hold of a brutal past, Doctor Casey Tyler found emotional freedom in an unlikely place, with an unlikely man, Nate King owner of King International Security not only saved her from a kidnapping but also from herself. With the tough walls broken down and a new found trust and love with Nate, Casey is ready for a new beginning as they slowly ease into a normal life together until… Casey receives a phone call from home.
Now having to return to Sydney Australia to face the man who destroyed her childhood, but this time with the strength of Nate by her side Casey is determined to put her past demons to rest once and for all. Only a trip for closure turns into more secrets and unearthed truths for Casey, turning her newly found freedom into something tangled and twisted in the horrors of her past.