Final answer:
Mama's words reveal her uneasy feelings about the changing attitudes of her children towards money and ideas, highlighting generational differences and parental concerns in facing societal changes.
Step-by-step explanation:
The concern expressed by Mama in the quote pertains to her fear and difficulty in understanding the changes she sees in her children, especially in the context of their attitudes towards money and unfamiliar ideas. This is reflective of a generational gap, where changes in society and individual aspirations can create dynamics within the family that are difficult for parents to grasp. Moreover, Mama's worries about her children reflect a broader concern regarding the future and well-being of one's family, something that many parents can relate to when grappling with social and economic changes.