Final answer:
The question inquires about a conversation between Summer and Auggie regarding her life and family, but the provided text excerpts do not directly answer this. Instead, they offer insights into how characters in literature might share personal and family experiences, indicating themes like family dynamics, cultural differences, and social interactions.
Step-by-step explanation:
In the provided excerpts discussing interactions among characters and their family related narratives, we can glean certain details about the characters' backgrounds and relationships.
While none of the excerpts directly answer the question about what Summer tells Auggie about herself and her family, we can infer that in such a conversation, a character might reveal personal tidbits and family dynamics similar to those illustrated in the passages.
For instance, we see familial affection in Trina's goodbye to her mother, the cultural differences in Caitlin's experience with Maria's family in Spain, and hints of social standing and expectations in Winterbourne's interactions with Daisy Miller and his aunt.
These themes of family dynamics, cultural differences, and social interactions are likely to be mirrored in a character-driven narrative such as the one between Summer and Auggie. Alas, to directly answer what Summer tells Auggie, one would need to reference the specific content from the source material which is not provided in the question.