Reg 125 crpc and 498 a case

Sir i am employee of prasar bharti in technical section. i am divyang person,i stay with my parent in andaman nicobar island my marriage on 11 june 2014. my wife and her family is ready to get marriage after know every thing truth about me.from i love her and my son very much after marriage we can go to dehradoon for honeymooni and my famile cannot ignore her at any stage she was go to banglore for B.ed frm banglore lal bahadur college of education with my own money his expenditure for bed course iss approx 4 lakh. one and half year my wife and my son not living with me because i cannot ignore my old age parent and brother because my brother is suffering from mouth cancer. she and his family alway told me to take transfer from port blair to varanasi hometown. she and her famile always ued abusive word for me and my family like mental dog, she can alway ignore for sexual matter also after living One and half year she filed a 498 a and 125 crpc false case.i am send legel notice from my advocate to come back but she not come and sent a reply. in 4 year she can living with me only 8 month. she chatting in facebook and watapp to his ex boy friend that boy friiend is his brother wife brother. i found some chatting after some time she can use another account to chatting with him. sir my family and me are not doing any fault. sir i plan to take legel action to her and his family. please suggest me.