Wife is cheating having whatsup chatting and her mobiles cdr, some close photographs also

I am a married government servent married since 11 years and two loving children's of 10 and 6 years old. Now a days from last two and half years wife having extra marital affair with his college coligue who is a policeman, they had long relation since college life. Wife's lady friend first called my wife then after she got conference call with that policeman each and every time when they want any type of discussion. Wife left me in January end for her cousins marriege and came in April end approximately 94 days she left my house with my children's. During this period she meet her college friend and got some photographs with him, when I have been checked her mobile I got her let night conversation with him saying that divorce me. Also got her mobile CDR for her calling details towards that guy, After seeing this type of communication I had discussed with her then she get sanitiser and tried to sucide and after that blamed me that I have demanded for dowry and harrased her from the marriage. I had discussed this issue with her cousin they also adviced her not to do this type of faults. Now she is staying with her father and didn't said her father about the matter what she made n that 94 days. Her father and she made a dv case against me and my parents with very false allegations and deManding for maintenance for her and children also. Since her behaviour like this from last 2 years I didn't went on my job it means. I have absentee in my job. In this situation can't afford lawyer also but now a lawyer friend helping me in this trouble. I don't want to loose my children's also. Please suggest me some guidelines in the same