mother-in-law share

Your query requires some clarity.  However, to my understanding, the person left behind will or family arrangement for his self-acquired property, then no one claims it.

No, the will shall prevail over the succession act. If the mother is alive then she has been vested with one share of the son and the brothers of the deceased can only request the mother to give them that part of the property and nothing else. This property that the mother has will be devolving upon these brothers even if she dies intestate while they are alive.

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