We the daughters of Melusina,' she corrects me. 'Your grandmother was a daughter of the water goddess of the royal house of Burgundy and she never forgot that she was both royal and magical. When I was your age I didn't know whether she could summon up a storm or whatever it was all just luck and pretence to get her own way. But she taught me that there is nothing in the world more powerful than a woman who knows what she wants and walks a straight road towards it.