No it is not correct at all
1.We are Christian. My window Grandmother sold the property 28 years back to my dad for her daughter marriage expense but there is no signature of my aunty on the will. My grandfather is a farmer and he did not leave any source of income. My dad was looking after the family, as per christian law if the property does not give any source of income atleast 5,000 rs the whole property belongs to my grandmother and she has right to sell the property without their children's consent is this correct.
Hello,
No this is not correct and the property will be divided as per the Indian Succession Act and the income from the land will have no effect on the nature of the property.
Regards
Incorrect.
Grand father property would have inherited i/13rd to mother and 2/3rd to his children. Grand mother can give/sell her share only.
Your understanding is right.
Moreover your aunt had been keeping silent about this so far hence even by adverse possession he can perfect his title.