When Shen Yunfang took leave and came back, she accidentally learned that Goudan's three children had lice and felt completely uncomfortable all over.
If these things weren't eradicated, they would spread, and she and her children might get lice as well. As for whether Wang Dan and her husband had them, that went without saying.
So Shen Yunfang, disregarding the kids' fierce resistance, threw the family of five into a big bathhouse and insisted they clean themselves before coming out. The family did get cleaned, but when they came out, they were wearing the same clothes they had on when they arrived.
Shen Yunfang asked them why they didn't change into a clean set of clothes after bathing, to which they bluntly replied, "We only brought this set of clothes when we came; we didn't bring any extras to change into."
Shen Yunfang didn't even want to look at Wang Dan feigning embarrassment. It was so obvious what she meant; even a fool could understand it.