Thank you for you reply Sir. Yes, since the day she deserted me, I started collecting email and phone conversation recordings as evidence in which she has repeatedly accepted that she left herself. Even the calls where I tried to call her back and she and her family refused are there with me. At first they said 'Its best you both separate peacefully and don't waste your youth' and now they are demanding Marriage expenses or else I will have to pay her maintenance. Till now my whole family has handled this situation very sensitively but now they're taking our decency as our weakness. Although I can pay the marriage expense but they are the ones who wanted divorce, I kept trying till the end. They have no ground whatsoever for divorce. I don't know on what basis are they so confident about maintenance. As Mr. Laxmi Kant Joshi highlighted, I'm sure they want to get her married again soon.
All the above are like shooting in the air without any target. Let things move. Do not keep guessing as to this will happen, that will happen etc. Until they make a move its useless to just keep thinking and trying to find solutions to what possibly they might do in the future. Cross the bridge when you get to the bridge.
At this stage is it safe to tell them "I won't give divorce. Do what you want, I've got enough evidence to prove myself innocent."?
Talking like that is childish. If you have such evidence as you state, use it during trial and cross examination not now. Just keep quiet now. Dont dance in front of the goddess as if she will be pleased to let you go.