How is the inheritance divided among the husband, the one full sister, and three full nephews?

If the heirs are limited to the husband and the full sister, and the deceased left no other heir, then the husband receives half as a prescribed share, based on the Almighty's saying: "And for you is half of what your wives leave if they have no child." And the full sister receives half as a prescribed share, based on the Almighty's saying: "If a man dies, leaving no child but a sister, she will have half of what he leaves." The sons of the full brother receive nothing because they are 'Asaba (residuaries) who take what remains, and nothing remains for them here. The inheritance is divided into two shares: one share for the husband and one share for the full sister. The matter of inheritances must be referred to the Sharia courts for investigation, as there may be another heir, or wills, or debts, or other rights that take precedence over the right of the heirs.