Catching them in action is almost next to impossible.
What I can obtain is
1. her call details talking to him late nights since months.
2. He visiting quite often to her place where she lives alone.
But that seem to be not enough :-( So I cannot do anything.
I don't have any other ground for divorce.
Cruelty cannot be proven.
Only desertion is th ground and for that I have to wait for 2 years and it still quite difficult to get divorce with that only.
I wish indian laws changes soon making it to gender neutral and I will file false 498a and DV on my unfaithful wife