What is the share of each heir from the mentioned inheritance?

If the heirs of the deceased are limited to the wife and uterine siblings only, then the inheritance is divided as follows:

The wife: takes one-fourth (1/4) as her prescribed share, due to the absence of descendants. The uterine siblings (males and females): take one-third (1/3) as their prescribed share, due to their plurality and the absence of descendants or ascendants.

What remains after the wife's and uterine siblings' prescribed shares is returned to the uterine siblings, but not to the wife, because the رد (return) does not apply to spouses.

The original basis of the problem is 4, and it is corrected to 20. Thus, the inheritance is divided into 20 shares:

The wife: 5 shares (one-fourth). The uterine siblings: 15 shares (one-third and what remained by return), and these are divided equally among them, so each one of them takes 3 shares.