This sister and brother duo have the most beautiful relationship in the world. When he says his life would be nothing without his little sister, you'll be moved to tears.
Dorothy Custer is the definition of gumption. Listen to her tell the story of how she met her husband, then at 2:10 she reveals the secret to long life (btw, it's the cutest thing ever).
Family is family. Siblings are siblings. As long as children are growing together in a secure environment, surrounded by people who love them, labeling those relationships serves no purpose. Half siblings are siblings. Period.