What did Yuanyang say to the old man in A Dream of Red Mansions?

The 40th time in A Dream of Red Mansions: Yuanyang dragged Granny Liu out and quietly told Granny Liu, saying, "This is our family rule. If we are wrong, we will laugh. " …… Yuanyang stood and whispered to Granny Liu, "Don't forget." Grandma Liu said, "Don't worry, Miss." ..... I saw a daughter-in-law standing there with a box, and a maid came up and opened the lid, which contained two bowls of vegetables. Li Wan took a bowl and put it on Granny Liu's desk. Xi-feng picked a bowl of pigeon eggs and put it on Mrs. Liu's desk. Grandma Liu stood up and said loudly, "Lao Liu, Lao Liu, eat like a cow. Eat one." But I drummed my cheeks and said nothing.

Judging from the context, Yuanyang wants Granny Liu to make a humorous sketch and give everyone an appetizer before dinner.