In-laws have no legal responsibility to financially support their stepchildren unless they adopt the children, thereby ending the biological parent`s legal rights and requirements as a parent. If a parent believes that the amount owed is unfair, he or she has the right to ask the court to increase or reduce the child support order. If both parents make a decision themselves, the judge must review the agreement and incorporate it into the parents` divorce order, as long as it is still a reasonable amount for the child. More than 100 countries currently have reciprocal agreements for family allowance orders. For example, the United Kingdom Reciprocal Enforcement of Maintenance Orders (REMO)  and Von Canada, Australia and New Zealand, the United States and the European Union.  Most provincial law firms have a legal service. . . .