Which personal law applies in your case?
Are you all Hindu?
The said property is agricultural land, rural, Urban, or it is a building?
Who was 1st owner of property; Grandfather or his forefathers?
The property devolved upon grandfather from his maternal or paternal side?
The said partition was by registered partition deed or with signatures of all Co-parceners/legal heirs or oral partition that is proved?
The whole property of deceased father was transferred to Mother? If yes; was IT by registered deed say; relinquishment/gift etc from other legal heirs in favor of mother?
Did mother transfer whole property to said son?
Has said son disposed/sold by registered deed say; sale deed?
As per your post there is NO clear information if there are daughter/married daughters in the families!
Are you a married daughter?
The property is in which state?
How is IT ancestral property?