Property Rights Of My Mother In Law

We have 3 acres of land in our native place. This land was purchased by my husband's grandfather directly in the name of my husband & his elder brother. That time my husband & his brother was minor so the land was taken care of by their mother. Now my husband is an adult so my mother in laws name was removed legally & his brother was expired last year so his wife's name added in the land sat-bara. Now my husband's brother's wife fought with us & living separately with her daughter. Now my mother in law wants to add her name or want some benefit from the land as the land was neither taken by my husband nor by my husband's brother. So my question is 1) Can my mother-in-law claim this land. , 2) Also, my mother-in-law wants her big daughter in law to get at minimum part of this property, is this possible.