Your query details is insufficient, Kindly confirm whether disputed property is self acquired or ancestral property of your father. In case, this property nature is self acquired, she can't claim over it. If it is ancestral property, property right shall be distribute equally between all children and one notional partition goes to your father. Hence, in this case, your small house can't distribute but share shall be calculated on market value of the property. Therefore, you can give some amount to your brother by preparing register family settlement deed or Register Partition Deed.