What is the share of each heir from the deceased's estate, given that the heirs are: a wife and a full paternal nephew?

If the heirs are limited to the wife and the full brother's son, the wife receives one-fourth due to the absence of a child for the deceased, and the remainder goes to the full brother's son by way of ta'sib (residuary inheritance), based on the Prophet's (peace be upon him) saying: "Give the prescribed shares to those entitled to them; then whatever remains is for the nearest male relative." The matter of inheritances must be referred to the Sharia courts for investigation, as there might be other heirs, wills, debts, or rights of which the heirs are unaware.