Its unfortunate that the current generation of folks have almost neglible patience & tolerance, huge amount of egos, in some cases greater confidence of getting away successfully with wrong doings and a very aggressive and arrogant behaviour. Each or combination of these are straightaway direct triggers to disastorous marital partnerships.
They simply want to live in today's world (which is fine) but not care of future.
My suggestion in your case would be -
0. 0 step would be - to have lot more patience, be calm and think positive
1. as a first step - attempt iterative discussions with her for reconciliation, involving whom she trusts most
2. Recommend for professional counseling for both of you - this will most likely enlighten both of you of the damage so far and potential damage in near future
3. If 1 and 2 don't work, involve sensible elders from her family and try to arrrive at MCD;
Please bear in-mind, because of the mis-deeds of many men in the past, most of the family related laws favor women mostly. Therefore, you have to be gentle in communication and tactful in dealing with the situation, as any small action from you that she can interpret as offensive can provoke her to misuse the law by invoking various acts that mostly go against men.
I am not trying to scare you, but suggesting to first attempt reconciliation - give it some time like few months, and if really doesn't work out, target MCD.
There are some pre-requisites if you intend to contest/file any cases against her, which the abled and experienced advocates can guide you on.
Hope this helps