Before I Was Your Mother — Kathryn Lasky

To Katie, it seems as if her mother has always been her mother, with her grocery lists, her purse full of bills to pay, and her boring, sensible shoes. But when her mother reveals that she once was a girl who bossed her little brother, wore firefighter boots to bed, and dreamed grand ballerina dreams, Katie realizes that she and her mother might be alike after all.
This humorous, warmhearted blend of past and present celebrates the special love mothers and daughters share.