Husband can file a case of adultery against his wife's paramour.

However, if paramour has a proof which can establish that he was unaware of the marital status of this woman then he would escape the clutches of law.

Husband can apply for divorce on the ground of his wife's infidelity.

section 497 provides .-- Whoever has sexual intercourse with a person who is and whom he knows or has reason to believe to be the wife of another man, without the consent or connivance of that man, such sexual intercourse not amounting to the offence of rape, is guilty of the offence of adultery, and shall be punished with imprisonment of either description for a term which may extend

in the present case your wife lover believed that your wife was not married and had supressed said fact of marriage . hence he would not be guilty of offence of adultery . you cannot punish your wife for said offence as lady is laways believed to be victim .

best option is to file for divorce on grounds of adultery

Hi, yes he can file a complaint before the police for adultery.

it is very difficult to prove adultary,better go for divorce by mutual consent she is also not interested to live with you

Who would like to have a wife who is not trustworthy? As suggested by my learned friends go for divorce by mutual consent and its very difficult to prove adultery against your wife because such things happen within four walls secretly and only circumstantial evidence should help you.

nothing left to add

u can filed a complaint of adultary but it defficult to prove it i suggest u just talk with her n filed mutual divorce it is a best for u