Her situation was far more dangerous compared to when she killed number six. Even though both were sneak attacks where her victim was caught unaware, the doctor was a much more difficult opponent than number six.
The two of them laid close to each other, and they could both see the killing intent reflected in each other's eyes. Song Qingxiao felt like the bones in her fingers were about to break because of the force the doctor used to try and snatch the dagger out of her hands!
The dagger was her only trump card. Hence it meant something different to her. If she wanted to survive, she needed the dagger when she went back to find the assailant who had killed her in the alley. If it were snatched from her by the doctor, her chances of surviving would disappear!