This book explores the significance of sister relationships in women's lives. It documents sistering experiences through narratives of growing up, caring for the family, leaving home, and becoming a mother. Girls and women describe their emotions, shifting power dynamics, and moments of transition in their relationships. Drawing parallels between sistering and caring, the book presents new material on a widespread yet invisible aspect of the social construction of femininity. It also contributes to sociological debates about transformations in intimate ties.