I found out my best friends wife has been cheating on him. I kept it to myself thinking it wouldn’t do any good as I confronted her and she said the affair was over.
I stopped to get a beer with him and he confided in me that he suspected her of cheating. I lied to him by not telling him what I knew. I felt really bad but then I knew it was too late to come clean.
Then I found out she was still seeing that guy. I was furious and confronted her again. She just said go ahead and she will rat me out, tell him that I have known about her cheating for a long time. And tell him I had tried blackmailing her into having s** with her to keep quite.
I don’t know any other way out of this but to keep quite and hope he never finds out.