Distribution of property in family after father's death

Family details- after my fathers death, there are total 5 members in family- Mother, 2 unmarried Daugthers, 1 Married son his wife and one Child (boy). Now my mother wants to separate his son. Assets/ Property Details: -2 Properties (Registered with Deceased Father name) -1 Property ( Registered with my Mother name which was transferred from my grandfather to my mother) - Death benefits paid to my mother i.e Insurance funds/ PF amount/ Gratutity... etc. - Monthly Pension income paid to my mother after fathers death. Please let me know the eligible share for me/ my wife/ my child son.