"Some people won't just give up." Jing Lihua was someone who kept her guard up at all times. How could she have not seen Lang Lan whispering to her attendants? She did. She knew what they were up to.
And if they assumed she would fall for it, they had another thing coming.
She was definitely not in a good mood after finding herself in an inescapable situation when it came to Zhou Liqin's matter. It appeared to her that Lang Lan had set herself to be a victim to give vent to Jing Lihua's frustration. Very well. If Lang Lan was willingly serving herself to Jing Lihua, she would not have any qualms about accepting her.