enough to explain, "I know her, but I don't know her well. You could say we have no connection at all.""She's your friend's sister, don't you have her phone number memorized You guys grew up together,..., will give her a birthday celebration." The girl speaking was called Sugar, Si Wanqiao's best friend. Sweetheart was her younger sister."Hello, Qiao Jie," Sweetheart greeted politely. She was sixteen...