Dafamation Case against divorced wife

In 2004 here was a divorce case against me by earlier wife , which, after a long 10 years' litigation proved to be fabricated and of no evidence . based on that I was acquitted and she was granted divorce as per her demand. the case ended in 2014 December. I have been working as a central govt.employee since before my marriage. I am still in the same job. Main allegations she levelled against me were 1. she wrote a defaming letter to my office with 23 different departments of relevance and no relevance alike. in it she wrote that i am mentally unstable and drunkard. but both were false ones. COURT CASE: 1.That i were drunkard/womaniser/sexually immoral/mad/party animal/dowry/ intimidated for compulsory abortion etc all these allegations proved wrong. 2.she put another false case that our child was showing epilepsy but medical check up followed by, proved that also was a fake one.but child custody is granted for her. now mt child is 13 year old I again married with another woman and we have a 4 month old girl child. And that woman also married with somebody .... Now i heard from my old Lawyer that she hinted him she is going to put some troubles against me further. I am working and living in Coimbatore and she is in kerala. QUESTION: 1. is it possible for her to put any case again if no fresh matters are there in between us? 2.(Very important) CAN I PLACE A DEFAMATION CASE AGAINST HER BASED ON ANY OF THE FALSE ALLEGATIONS SHE MADE AGAINST ME AND THUS SPOILED MY CAREER AND PUBLIC LIFE.