What symbolism can be found in Lillian's letter to Fenno in the novel, Three Junes?

Lillian’s letter to Fenno symbolizes family closeness and the importance of family. The letter explains the inability of Dennis and Lillian to conceive, and requests that Fenno donate sperm so that they might conceive. Fenno agrees. By asking Fenno to donate, the letter becomes symbolic of family closeness, demonstrating how needed and how important Fenno is to the family. By accepting the request, Fenno demonstrates how important family is to him.