Principle objective of this lecture is to present on Family Fluidity. Here briefly describe on the Companionate Family 1950s: Wives companions (not slaves) to husband and children; Greater emphasis on personal fulfilment Women work for ‘pin’ money; Birth control for planning children within marriage and Higher expectations of marriage. Finally focus on the Biological FamilyLate C20th: Biological ties rather than marital ties; Shared responsibility for childcare and economic support; Based on ‘two earner model’ instead of ‘marital support’ model and Parenthood supersedes marriage as bedrock of the family.