Christine and Elena grew up in the same suburb of Sydney and first met at kindergarten. They took to each other immediately and became inseparable friends throughout their school lives. Elena's parents had moved from Greece to Australia, and her grandparents still lived on the small Greek island of Santorini, When she was 16, Elena visited her grandparents for the first time. On returning to Australia, she talked endlessly about her grandmother's next-door neighbor, Mara. When Christine expressed puzzlement at Elena's obsession  with people next door, Elena admitted that Maria had a handsome son called Nicos. She showed Christine a photo of him, standing next to his prize possession, a motorbike. Elena and Nicos exchanged emails for a while, but suddenly Nicos stopped writing. While not heartbroken, Elena was nevertheless hurt. A year later, when Christine announced that she was going to visit Greece, Elena begged her to visit Santorini and say hello to Maria and Nicos. Christine agreed to do so.                When she flew into Athens on an unseasonably cold day in September, she quickly realized that she hadn't brought enough warm clothes. Walking through the streets of the Greek capital, she happened to see a nice coat in a shop window and went in to ask about the price. The coat was too expensive, but as Christine was about to leave the shop, the woman asked her where she was from. When Christine answered Australia, the woman agreed to reduce the price because she knew a nice girl from Australia called Elena. Christine then noticed a photo of a young man standing next to a motorbike. Her eyes opened wide with astonishment. It was Nicos! Indeed the young man was Nicos, and the woman in the shop was Maria. She had come to Athens from Santorini to look after the shop for a friend.               Sadly, the story has a tragic ending. Nicos had been killed in a motorcycle accident.                "I wanted to tell Elena," said Maria. "But I didn't know how. Now that I have met you, I know that it's time to tell her." What can be inferred from the fact that Christine and Maria had a talk in the shop?
They two had planned the talk before. They met each other accidentally. They were business partners. They recognized each other.