Zak's eyes widened as he watched her become fearful. Was she traumatized at this cabin? It was clear that she has some post traumatic stress. 
"It's okay Holly," he said, trying not to make her fear him. He backed away to give her some room. His fists were clenching as well. Some form of anger built up in him. Who could hurt someone and scar them this bad? This scent was very old, but her memories keep it alive. He shook his head, "don't dwell on then. You are in a safe place," he said, still trying to figure out some way to ease her tension.