Cheating case

I'm not sure there is any legal recourse to it. Marriage is an institution based on consent and if she doesn't will to marry you, it's in her right. Being capable enough to understand the nature of relationship you were in, clearly conveys your understanding in the light of circumstances surrounding us and therefore, you won't be entitled to any such relief on this ground.

If she decides to give birth to child then you shall be biological father.

You remained together with consent.

If you are parting with consent, part at happy note.

Litigation can be stressful, protracted, expensive.