Scout's Uncle Jack arrived on the scene as she was giving her cousin Francis a good pounding during the Finch family's visit to Finch's Landing. Francis had repeatedly called Scout (and Atticus) a "nigger-lover," and she finally decided to put an end to it.
... I split my knuckle to the bone on his front teeth. My left impaired, I sailed in with my right...
Uncle Jack didn't bother to ask why the two were fighting; instead, he broke them up and, while
Aunt Alexandra ministered to Francis, wiping his tears away with her handkerchief, rubbing his hair, patting his cheek...
Uncle Jack began spanking Scout. Scout was angry because Jack had not
"stopped to gimme a chance to tell my side of it--you just lit right into me."
Once Scout had explained, Uncle Jack was ready to punish Francis, too, but Scout made him promise to "just let it go." Jack later apologized to Atticus for having "romped on her," but Atticus only "chuckled."
"I shall never marry, Atticus."
"I might have children."