Ling Hua was a person who could bend and stretch, capable of utilizing herself to the fullest. If she needed to accomplish something or reach a goal, she was willing to use everything at her disposal at the right time. So, when it came to probing Shi San Niang, she didn't mind letting it slip that she had schemed against Yan Qing.
To test someone who might be hiding something deep, ordinary methods would certainly not suffice; a strong approach was needed.
This strong move of hers, whether effective or not, would reveal something.
At least now, she could see that Shi San Niang was truly shocked to the core about her scheme against Yan Qing—an emotion that clearly affected her, so much so that she was startled enough to forget to stop pouring when the cup was full.