Wife had an ongoing affair with Coworker who is also a pastor from the sister church we attend M32-FM30

I caught my wife having an affair with her co-worker who is also a pastor at our sister church. When I caught her the first time she didn’t come home until the next morning saying that she was drink and fell asleep at a friends house. Something told me to check her phone and I found out she cheated. I was willing to forgive and look in counseling but, yesterday I found that she had been going to the guys house when I’m at work for the past two weeks, she even went to his house on a day when we attended some else marriage In the evening. I’m ready to divorce her but not sure how to go about it? Suggestions