1) please clarify whether sales agreement was duly stamped and registered?
2) if first owner has left a will in your mother name why did you not on basis of said will apply for transfer of property in your mother name . ?
3) has the will been signed by the first owner and attested by 2 witness es?
3) you can apply for probate of will . notice will be issued to all legal heirs . if none of legal heirs contest the will probate will be granted in 6 months
4)the power of attorney in your father names ceases on death of the first owner .
5)on basis of probate you can apply for mutation of property in your mother name before the housing board .