Regarding family pension

R/sir i want to ask you that in 1993 my father died he was an govt employee in haryana state he married twice in his life because first wife died due to illness,,with her he had a girl child and after that the second marriage done but after 6 years my father died and the pension is divided in between daughter with the first wife (died) of my father and the second living wife thats my mother now my sister got married since 2003 neither she is getting pension after marriage of her portion nor my mother getting that portion here i am asking you whether now living wife is elligible to claim that rest portion of my sister from first mother or that portion of pension is unclaimed whether my mother is elligible or not?? thanks in advance