Property dispute between sisters after death of grandmother

Hello i am student . i am writing on behalf of my mother .my mother's siter is causing trouble in sharing the property . after the death of my grand mother the property has to be shared equally . but my mother's sister want a bigger share of the property . she has the original land documents . we have only zerox still the property is not yet registered on my mother's name .we want to register as early as possible because there is wedding for our sister we want to register on my sister 's name . total property is 200 gajas . there are two houses on that property one house is big and other is small. bigger one is around 130 gajas and small one is 70 gajas . my mother's sister wants to give smaller share to my mother . if we try to question the reply was to complaing in court . we are no financially strong to meet the expences of court and fees of the lawyer . please give us advice how to perpare our selves and appear before court .