According to the provisions of the Marriage Law, the rights and obligations between a stepfather or stepmother and his stepchildren raised and educated shall be governed by the relevant provisions of this Law on the relationship between parents and children. If the stepchild is underage when the parents remarry, the relationship between the stepchild and the stepparent is formed, and the stepchild has the obligation to support the stepparents, and the obligation to support the biological parents still exists.