Tate stabbed her now in the chest that she seemed to be noticing the blood coming from her blood and her arms weren't as strong as they had been, protecting her heart. It hit her in the upper right lung, which he figured might speed up the process. If he had been a caring, or even sympathetic person in anyway he would have just finished her by snapping her neck, but she had ticked him off far too many times for him to give her that now.