Grandmother & mother transfer maternal property to one grandchild

Hello Lawyers I belogs to A sikh family and lives in Moga district of Punjab. We are two children of our parents me and my younger sister. Due to disputes in between our maternal and paternal family me and my sister lives separetely. She lives with paternal grandparents. Me and my mother lives in my maternal grandparents home. My father also favours my sister and in 2008 when i was only 13 he sold his entire property and gave it in the hands of my paternal grandfather for my sister's study and future maintainane. Me and my mother got nothing and even not informed about it. My mother is only daughter to my maternal grandfather and after his death his property was equally devided between my mother and grandmother. Bcz i got nothing from paternal property my mother and grandmother wants to gave entire maternal property to me.Now My questions are: Can my mother and grandmother made a transfer deed or will in my favour ? Can my sister ask for any share in that property? Plz advice ! Thnx