This discussion clarifies inheritance rights following a father's recent passing. While you and your mother and sister are legal heirs to his property, your wife has no claim. If your father gifted a house to your unmarried sister while alive, you have no right to that gifted property. You can claim your rightful share of other properties, including rent and maintenance, but avoid locking the house. It's advised to seek legal counsel for a partition suit and to resolve family disputes amicably.