The tone is the way an author approaches the subject of a story, and which is determined mainly by choice of words and syntax. In this excerpt, the description of the woman's actions like the fact that her feelings get so strong she runs out of the house, her crying and the lack of attention to her children's jokes, gives us the idea that the woman is troubled and anxious, and it all contributes to developing a concerned tone in the text.
The speaker seems to care enough to reproduce the many things that the speaker has been told, describing them to us one by one, letting us know the agony that those women felt during that moment, even though it is briefly described.
