Call recording of wifes mobile calls can it be used as evidence

My wife is not loyal to me and my family, I have recorded her conversation with her mom through spy call recorder (App)where she discusses all the things that happen in my house with her mom.They use bad language for us and overall mood of conversation is against us. She gets guidance form her mother that how to behave with me and family and they conspire. She is a liar, not loyal to me bcos of this I have no trust on her, she is not obedient. I have recorded individual conversations with her & her parents where they have lied about their regular phone calls Q1. Can I use those call recordings which are recorded thorugh a mobile app that I have installed on her mobile without her notice, can these call recordings be used for filing divorce on which ground Q2. Does recording calls of wife, without her knowledge comes under cyber crime/IT Act 2000 or create problem on right to provacy etc. Even if wife is in wrong doings behind my back. Q3. Can I use those call recordings in defense if she files 498A/DV/CRPC 125 etc.or as evidence in seeking divorce