C. F. Keil and Franz Delitzsch on Deuteronomy 25:11-12

Deu 25:11-12 “But in order that the great independence which is here accorded to a childless widow in relation to her brother-in-law, might not be interpreted as a false freedom granted to the female sex” (Baumgarten), the law is added immediately afterwards, that a woman whose husband was quarrelling with another, and who should come to his assistance by laying hold of the secret parts of the man who was striking her husband, should have her hand cut off.