Reborn, She Took Advantage of the Emperor in Her Previous Life

In her last life, she was forced by a man to become a crown princess, a queen, or a queen mother. She thought she resented that person, but when that person actually died, she realized how painful it was. She drank the poison and left with him. When she woke up again, she was back to the time when she was eight years old, before everything started. But, why would that person suddenly live next to her house and greet her with greetings?