This report presents information about two ways in which children’s lives may be complicated through the nature of their parents’ relationships. One complexity examined is that of children having a new father figure, and the other is that of children having their own father living in another household. Findings from Growing Up in Australia: the Longitudinal Study of Australian Children (LSAC) provides opportunities not only to examine how common such experiences are, but also to explore the nature of parents’ relationships and the lives of the children who have these experiences. Data from the first three waves of LSAC have been used throughout this report.