Wife Is In Affairs

Wife is in affairs with a gym trainer.I found out the things from her WhatsApp messages and her mobile bills. Conversation is like gf-bf. When I asked her showing call details of mobile bills, she was telling in wrongly doubting her. But unable to give reason for those long duration calls. My in-laws were also on her side. They're telling I made that mobile bills by myself, their daughter is pure. I had taken their conversation screenshots. Will this sufficient as a evidence? Currently I'm in business travel and and she dint want to come with me, so she stayed there alone. Now she's going to the gym daily without my consent also while I asked what are you doing whole day. She is telling it's none of your business. She will not gonna tell me what's she doing.. if I asked her again she'll do suicide and will note my name and will call police before that. And she wants divorce and money. She threatening all the time to prepare myself to give her money. She also threatened that she has the power to put my family behind the jail. Please suggest me what can I do at this stage. She's getting very dangerous now. I know there is an influence of that gym trainer.