Gabriela Stefan Sabbioni showed up uninvited in my bedroom on my birthday. He stood in the shadows smelling of whiskey and death and wrapped a broken, blood-crusted necklace around my neck. I thought he'd strangle me with it. That night, he left a message for my father. He said he'd be back to take something precious. I never delivered that message, though. I wonder if things would be different if I had because now, two...