When Heidi Evans's ninety-one-year-old aunt died, her sons were dumbstruck to discover a bankbook with a balance of $50,000 hidden in her top drawer. She had been a devoted housewife and mother all of her adult life -- so where had the money come from? But the women in the family just smiled. They knew. Like generations of women, Aunt Lee had been building a nest egg, stashing away a few dollars a week from her household allowance (and maybe sometimes from Uncle Irving's pockets) so that she could have a little money of her very own -- for a rainy day, for her kids, or just to pay for her...