Status of land bought with yielding income of ancestral property

my father has the total property of 50 Acers land. out of that 38 Acers are ancestral and 12 Acers are bought by him. He is the farmer and he bought the 12 acers with the yielding income of 38 acers ancestral property. He does not have any other source of income. Could you let me know is it ancestral or self acquired property? more over my grand father has two wife's my mother is the daughter of first wife. After died of my grand mother he got married another women she has 4 children. my grand father is alive. Can my mother get equal share in all the property with second wife children?