How is the inheritance divided among a wife, a full sister, and two full nephews?

Nieces have no share in the inheritance. If the heirs are: a wife, a full sister, and two full nephews; then the wife gets one-fourth due to the absence of a direct descendant, the full sister gets one-half, and the remaining portion goes to the two full nephews by ta’sib (residuary inheritance), divided equally between them. The estate is divided into eight shares: two shares for the wife, four shares for the full sister, and two shares for the two full nephews, one share for each.