In Jodi Picoult's novel "My Sister's Keeper," the protagonist grapples with the complexities of family dynamics and moral dilemmas surrounding medical ethics. The story revolves around a young girl who was conceived to be a genetic match for her sick sibling, leading to deep conflicts about sacrifice and autonomy. The emotional strain of living in the shadow of her sister's illness raises questions about identity and the boundaries of love.

The quote, "In the end, though, I did not kill my sister. She did it all on her own. Or at least this is what I tell myself," encapsulates the protagonist's internal struggle. It reflects her desire to absolve herself of responsibility for her sister's suffering, emphasizing the themes of guilt and self-deception that run throughout the narrative. Ultimately, it illustrates how individuals cope with the weight of family expectations and the choices that define their lives.