Why does King uses Katie's phone dialogue with her sister Lois and the squabble among the children to show that?

King uses Katie's phone dialogue with her sister Lois and the squabble among the children to highlight the themes of familial connections and the complexities of relationships. Through these interactions, readers see the tension and support that coexist within family dynamics, illustrating how love can be both a source of comfort and conflict. This duality emphasizes the struggles and resilience of familial bonds in the face of adversity. Ultimately, these scenes serve to deepen the reader's understanding of the characters’ emotional landscapes.