On the day of Old Mr. Fu's birthday banquet, before leaving, Lu Sheng thought of Fu Siya eavesdropping outside the door on her conversation with Grandpa Fu, and she couldn't shake off a feeling of unease.
Fu Siya was a difficult person, inherently petty and arrogantly domineering. That evening at the party, being humiliated in front of so many people, it was certain she harbored resentment towards her.
Lu Sheng wasn't afraid of Fu Siya causing trouble for her.
What she was worried about was that Fu Siya might trouble Old Mr. Fu.
Old Mr. Fu suddenly appeared at the party that day and spoke those words to Mr. Ji Weiyuan, purely out of protection and to extricate Fu Siya from her predicament.
Even knowing Fu Siya was lying, Old Mr. Fu still chose to protect her. Calling her into the room afterwards was also to apologize to her on Fu Siya's behalf.