Prompt: Write a short story about a man who discovers a magical portal

John was just about to retire when he found a magical portal. He stepped through and found himself in a magical world. He walked for hours through the trees and fields, until he found a clear lake. He sat down and gazed at the beautiful view. Suddenly, he saw a beautiful woman walking towards him. She had long, blonde hair and green eyes. She smiled at him and sat down next to him. They started talking, and John soon realized that he had known her all his life. She was his sister!