Is it permissible to sell the deceased father's house to give the brother his share of the inheritance, given the wife's refusal to sell due to her need for the house while living abroad?

Your brother has the right to demand his share of the house, and he cannot be prevented from doing so due to your unwillingness to sell the house. It is permissible to buy your brother's share, and this is called "takhāruj" (mutual disengagement), which is permissible by mutual consent. Your purchase of his share is a good deed that reunites the family and honors your mother. As for your wife's objection, you could sell the plot of land you own to pay your brother his share, or you could explain to your wife that honoring one's parents is the cause of all good.