ततः पतिसोदर्यं गच्छेत् ॥ कZ_०३.४.३८ ॥
tataḥ patisodaryaṃ gacchet
Thereafter, she may go to (be joined with) the husband’s full brother.
It keeps property, dependents, and lineage responsibilities within the same agnatic household, minimizing administrative conflict over assets and guardianship.