One of my family member wants divorce from his wife

One of my family member got married in feb 2019. Now he wants divorce. Before marriage he was in love with some other girl of different religion. But family convince him to get married within religion. Due to family pressure he married. There was also an FIR against boy , when he refused to marry his girlfriend of other religion. But nobody knows about this. After marriage the boy found that girl is having some relationship with other boy. He saw some whatsapp msg in mobile. So he got suspicious and hacked his wife's mobile to record all calls and messages. After recording he figured out his wife has 4 boyfriends and also found that she went to meet her boyfriend in hotel room. In this 1 year they did not have any physical relation. His wife kept complaining about that to her parents and inlaws. Now boy has disclosed this to everyone. Girl is staying with her family for last 2 months. According to boy he waited for 1 year because divorce with mutual consent needs 1 year of marriage. He has all call and msg recording. Boy's family is also against divorce due to stigma and fearing legal action by girl's family. My questions are:- 1. How much time does it take to get divorce. 2. What legal options girl have to avoid divorce? 3.Can girl implicate boy's family in legal cases? 4. How boy;s family can protect themselves? Regards