law: Hindu Adoptions and Maintenance Act, 1956 
  19. Maintenance of widowed daughter-in-law 
  (1) A Hindu wife, whether married before or after the
  
  commencement of this Act, shall be entitled to be maintained after the death of
  
  her husband by her father-in-law:
  PROVIDED  and to the extent that she is unable to
  
  maintain herself out of her own earnings or other property or, where she has no
  
  property of her own, is unable to obtain maintenance- 
  (a) from the estate of her husband or her father or mother, or
  (b) from her son or daughter, if any, or his or her estate.
  (2) Any obligation under sub-section (1) shall not be
  
  enforceable if the father-in law has not the means to do so from any
  
  coparcenary property in his possession out of which the daughter-in-law has not
  
  obtained any share, and any such obligation shall cease on the re-marriage of
  
  the daughter-in-law.