Mary let Johnny's hand go and raised her arms as quickly as she could to fend off the killer as the woman brought out that knife. Oh how she hated the knife at this point. Unfortunately, Mary's limbs weren't cooperating like they should. She was sluggish from days of being bound and blood loss, more paralyzed by fear than she would have liked.
When she heard her dad's voice, it energized her. Gave her the strength and burst of speed needed to move away. She hated to move further from Johnny's body, but this was necessary.
"Dad! In here!" She shouted, desperate for him to find her in time.