The father heard Liu Xiaodan's voice and turned to him like he was a lunatic. Moreover, he was actually smiling strangely in the father's direction. This very image actually sparked the flame of rage inside the man's system. He had nothing to vent his frustrations on so punching a stranger who dared to touch his wife shouldn't be too much for a despairing father, right?
That was why the man attacked Liu Xiaodan before the magic one realized that an actual human was lunging at him. It's just that before the father's fist reached him, Liu Xiaodan was pulled to the side. The father missed and stumbled, but Liu Xiaodan and the other man went to catch him.
"Mister! Why did you attack me?" Liu Xiaodan asked with all innocence. What could he do? The gray-skinned woman was so opaque; Liu Xiaodan didn't see him turn while the magic one was taunting the entity.