Does money have to change everything?

Charlotte Johnson is twelve but short for her age. She has a lovely brother, Spencer and a not so lovely sister, Chelsea.
When their mum wins £3.7 million on the lottery they all assume that life will change for the better. But they haven't counted on how everyone around them will react.

Charlotte's best friend is acting strangely, and someone's spreading cruel rumours at school. Can Charlotte use the money to change things for the better?