does this book demonstrate that family is broader than people we are related to by birth? how?

A key theme in the novel is the author's assertion that families are comprised of varying components. No one family is more real than another. As Crow struggles with a deep desire to learn about her family heritage, she asks Osh, who for all intent and purpose is her father, what her "real" name is (6). Later, Crow states that she thinks she knows who her "real parents are" (126). Her statements suggest to Osh that he is not real enough for her and that somehow all he has done has not been good enough. He feels that Crow wants something more. However, she presses him to consider her feelings from her perspective and his love for her allows him to see beyond his own feelings. He helps her try to find the answers for her questions.