Are brothers and sisters not legitimately related bound to support each other? What is the exception?
Brothers and sisters not legitimately related, whether of the full or half-blood, are likewise bound to support each other to the full extent set forth in Article 194, except only when the need for support of the brother or sister, being of age, is due to a cause imputable to the claimant's fault or negligence. (Art. 196, Family Code)