A, a Hindu, has two wives W1 and W2, and one son S by wife W1 and four sons S1, S2, S3 and S4 by wife…

On partition between a father and his sons, each wife receives a share equal to a son under the applicable Mitakshara partition rule. Counting A, five sons and the two wives gives eight equal shares, so each wife takes 1/8. Premshankar distinguishes this partition allocation from an intestate succession rule under which multiple widows may collectively take one heir’s share. The ordinary premise is that both women have the legally recognised wife status stated in the question.