Which Reminds Me

Many years ago my sister and I were sitting side by side in airplane seats and a man in the third seat over struck up a lively conversation with my sister. At one point he asked me if I was her chaperone and I said no, actually I am her sister, not her chaperone. I thought that a strange thing for him to say. He was obviously Jewish, not Chilean, and yet he seemed to know who my sister was. I thought that was very strange that he would seem to know something.