Philippine Family Code, Art. 195

Subject to the provisions of the succeeding articles, the following are obliged to support each other to the whole extent set forth in the preceding article: (1) The spouses; (2) Legitimate ascendants and descendants; (3) Parents and their legitimate children and the legitimate and illegitimate children of the latter; (4) Parents and their illegitimate children and the legitimate and illegitimate children of the latter; and (5) Legitimate brothers and sisters, whether of full or half-blood