Counter cases should be filed only on solid proofs. Mere allegations makes your life more worse.
As your lawyer said (Seems good gentlemen lawyers), though it could be done, it is waste of time and money. More than that it is just a waste of you and your family's peace.
Depending on actual facts of your case, you can put many cases like Tax Evasion, DP Act, cheating, fraud, false proofs, defamation and so on
But have a peaceful life for you and your family's good. If possible suggest the same to your wife side also...