Andromeda took another sip of her coffee, switched Teddy to the other arm, and offered her hand to the young man. "Unfortunate indeed," she said with a twitch of a smile, "my sister and I had only our appearance in common. Andromeda Tonks."
Truth be told, she was quite used to this. Since the war ended and her sister had been killed, dozens of people had made the very same mistake that he had. It was nice that he wasn't running in terror.