How is an inheritance distributed if the deceased left behind two wives and 12 full nephews?

If the deceased left no heirs other than his two wives and the sons of his full brother, then his two wives receive one-fourth as their prescribed share due to the absence of any lineal descendants. The remainder goes to the sons of his full brother by virtue of ta'sib (agnatic relation).

The inheritance is divided into sixteen shares: his two wives receive four shares (two shares for each wife), and each son of his full brother receives one share.