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