Zhao Youyue must admit that she had a great psychological advantage over Shi Jingnian. At the same time, she was aware of his innate desire to please beauties. Therefore, she was not that diligent in donning her 'mask,' when around him.
It was a delightful experience for Zhao Youyue to expose some of her evil nature, once in a while. That mask of hers was a rather weighty burden.
Besides, Shi Jingnian was an extremely wishy-washy character. Being nice to him won't yield any results. He only complied when given commands. He preferred the tough approach, rather than the soft, civilized, customary charades.
It was precisely because Zhao Youyue had seen through Shi Jingnian's nature, that she often acted like a queen in front of him. Adapting to different situations, giving different individuals specific treatments, was all but one of her basic skills.