Cheating in Marriage

Hi.. I have been married now for 9 years approx. with two children (female) to one wife.. Before 21 months she conceived again and she gave birth to a male child. She revealed to me that she was in an affair with a church pastor, who is almost 10+ years older to her. He is already married to two women (one divorced him) and he got married to a second one and has two children (one boy and one girl). We were attending that church as that pastor sought asked me to help them in playing music. There were disagreements between me and wife and he told the church and me and her that he is like her own father and deceived the whole church and me and my family. Now she said that the baby boy she gave birth to is his child and that she doesn't want to continue our marriage anymore. Its been close to two months now that this is revealed, I am not sure if I can file a criminal case against that pastor who deceived my wife and broke my family and also kicked his wife and children out of his life. Please help me know if I can file cases against these cheaters and if I can take any legal action if yes, how should I do that?