First, if your brother resolutely disagrees, and he continues to give you money, you can only agree. Unless he doesn't give you the money behind, you can sue him to check out or give you money. Second, it depends on whose name it is to repay the mortgage with * * *. If it is unilateral, it is still unilateral property. Third, like the first one, you won't come back unless your brother breaks the contract or you reach an agreement ... Fourth, it's not a gift, it's a will. Your father can revoke the will, but the premise must be notarized again …