Live-in-relationship

A live-in relationship also called cohabitation and is an arrangement when two people involved in a romantic and s*xual relationship as partners for a long term or permanently, decide to live together without marriage.

Therefore the concept of bigamy or the offence therein does not arise if either of the spouse later marries another person.

This was not a marriage with her partner but you can file a petition seeking annullment of your marriage  for the reason that she had a child before the marriage and suppressed the same at the time of her marriage.with you.

Provision of Section 494 IPC applies to a spouse who got remarried (except Muslims) during subsistance of his/her marriage. 

In the instant case she did not marry with her live-in partner as stated by you, hence she cannot be punished. 

However, if you have evidence of her live-in relationship it is a valid ground for divorce.

Very well explained by learned senior expert Mr.T Kalaiselvan, I fully agree with his advise.

As it is illegal relationship file petition for divorce.

Yes, the facts posted do not suggest proof of marriage. However, those facts constitute substantial grounds to seek divorce.