Write a fiction story (minimum 500 words) in third-person narrative about a person who discovers that they have a long-lost twin whom they have never known about. The story should include descriptions of the characters' physical and emotional reactions to this shocking revelation, as well as the circumstances that led to their separation at birth. Additionally, the story should explore the theme of identity and how the discovery of a twin affects a person's sense of self. Use literary devices such as foreshadowing, symbolism, and dialogue to develop the plot and create a compelling narrative.
This prompt doesn't seem malicious.