I am not an advocate, but, here is my humble opinion:
First, forget about reconciliation. That is normally not the advice I give but in your case it warrants such an advice. Now electronic evidence is an evolving field and there are legal experts who specialize in this area. Advocates on this forum usually throw opinions without proper research. You need to preserve this evidence and to do so, you need an effective way to do so. For example, a printout, by itself, of email or FB communication, is basically useless. The communication itself can be erased and later denied. There are sophisticated methods and there are common-sensical approaches to preserving such evidence for future use.
First, as for email and social networking sites, save the entire page, as is in its full glory (usually you can do this in most browsers with a "Save as" option on right-click but there are other ways and even sites for doing so. I am not current on this topic though.). Have it done by some professional, meaning any ordinary computer guy who has a basic degree because you need to use him as an "expert witness." He should put the electronically saved folder of the content on a CD or pen-drive and write an affidavit at the same time to confirm its authenticity and retain another copy with him which he will produce during his testimony. Do it with two of three other persons just in case one person develops cold feet at the last minute. Then email this folder back to her and to others common friends so that you have more witnesses and other methods to back your claim.
The more legally correct way would be to issue summons to the social networking site or email service provider and have them produce the communication in the form of an affidavit or some form of formal letter which you can use in your affidavit.
Right now... be smart and alert. Do not be frustrated. These kind of cheap women ought to be dumped with minimal damage. So, go in damage control. Do not let your profession be impacted. Keep collecting evidence. Do not show any signs of emotional distress. Act, feel and be without emotions like the Vulcan Spock in Star Trek! When you have sufficient evidence, file for divorce. Do not file for RCR as it will take two years minimum. I am not sure about the time period limitation for filing divorce after marriage. Check that out.
Counter-attack. In the mean time, start to gather data on her brother, father, etc. Find out who their enemies are. Go and meet them. Find out the place of work of your in-laws. If they start harassing you, send legal notice to them at their place of work to the attention of their HR department. Hit back hard on every move of theirs. Come up with every "cause of action" you can that you can serve legal notices on them. Show them that you mean business. Do not cow down. They will butcher you! Just send the message to them that you want divorce with minimal damage to both parties.
And be careful of advocates. Most of them are morons or idiots, usually both. Do not sign anything shoved before you at the last minute. Take at least a week to review and do not sign if you do not agree. Insist of additions, deletions or modifications that make you feel comfortable.
GOOD LUCK!!!
