Adueltry is tuffest thing to proof for both husband and wife.
If you can proof then husband or wife can maximum seek divorce on ground of Adueltry.
But husband/wife failed to proof the same then it amounts to cruelty. other party can seek divorce on cruelty.
Both husband or wife can not file 497 if other partner is adeltrus.
yes 497 is appplicable if male member have s*x with married women , then husband of second women can file 497. But if maried man is have relation with unmarried women then 497 is not applicable.