"Sisters, while they are growing up, tend to be very rivalrous and as young mothers they are given to continual rivalrous comparisons of their several children. But once the children grow older, sisters draw closer together and often, in old age, they become each other's chosen and most happy companions. In addition to their shared memories of childhood and of their relationship to each other's children, they share memories of the same home, the same homemaking style, and the same small prejudices about housekeeping that carry the echoes of their mother's voice."