If Calpurnia had ever bathed me roughly before, it was nothing compared to her supervision of that Saturday night’s routine. She made me soap all over twice, drew fresh water in the tub for each rinse; she stuck my head in the basin and washed it with Octagon soap and castile. She had trusted Jem for years, but that night she invaded his privacy and provoked an outburst: “Can’t anybody take a bath in this house without the whole family lookin‘?” What is the purpose of the above paragraph?

(to kill a mockingbird ch. 12-13)