When the couple has children, the stay-at-home parents or grandparents usually help raise their grandchildren before they reach school age. Grown-up children usually also live in until they get married and sometimes even until after they have their own children so that the grandparents can help raise them or sometimes until they save enough money to build their own house. However, one of the children (usually the youngest daughter in big families) lives with the parents, inherits the main house, and takes the responsibility of taking care of aging parents.