Which episode is the infection of nanny's grandson in the second child era?

The infection of nanny's grandson in the second child era was in episode 28.

The plot of a play

In the evening, the whole family sat around the dining table for dinner. Aunt Tian and Liu Xiner scrambled to eat chicken legs, completely ignoring their parents. Mrs. Pang Ruo finished eating a chicken leg.

That's not to mention. Soon after dinner, Aunt Tian ate the precious durian she bought privately.

A few days later, Aunt Tian took her grandson to work in Lujia. Pangpang got hand, foot and mouth disease, but Aunt Tian didn't tell the truth. It was not until Lu Xiner was taken to the hospital with hand, foot and mouth disease that Aunt Tian's lies were broken.