The title refers to the Saturday Evening Post, a magazine that publishes current event articles, editorials, human interest pieces, humor, illustrations, a letter column, poetry, single-panel gag cartoons and stories by the leading writers that has roots in Benjamin Franklin's The Pennsylvania Gazette that was first published in 1728. The magazine is also well-known for its lavish cover art that include the work of Norman Rockwell.
You can see Mammy Two-Shoes' face for two frames as she runs back to the house.