Defenseless: The Salvation Series, Book 5 (The Salvation Series, 5)

My life is a secret.
His life is dangerous.
We’re both stubborn, calculating, and controlling.
Mark Dixon doesn’t know what he’s getting into. He doesn’t know his games could cost us our lives. I have to do what is necessary to keep us alive, and that means guarding my heart.
But I know I’m defenseless against him, and in the end, he’ll force me to surrender.