Ancestral property belonging to A was divided into 5 shares to benefit his wife and 4 sons after A's demise. Wife's share was divided into 4 shares of sons. Son-1 died and the share passed on to his wife, daughter and son and to this day is undivided. Wife of son-1 has willed her share to her son's two boys. Is such a will valid in the absence of a consent letter from the daughter? If the share is divided and then willed, will it be valid?