npr reports:
India’s Supreme Court has struck down a colonial-era law that made adultery illegal, calling it arbitrary and saying it is unconstitutional because it “treats a husband as the master.”
Section 497 of the Indian Penal Code makes it a crime for a man to have intercourse with another man’s wife “without the consent or connivance of that man.”
The law gives a husband exclusive right to prosecute his wife’s lover — and does not grant a wife power to do the same. It does not penalize the woman, nor any married man who has sex with an unmarried woman.
https://www.npr.org/2018/09/27/652075778/women-are-not-chattel-says-india-s-supreme-court-in-striking-down-adultery-law