My wife used certain friends to help hide her affair and deceive me. To be clear, they were willing and had knowledge of her affair. She still keeps these same friends. I am extremely disturbed that someone would keep friends who would do such a painful and heinous thing to someone they knew was a good person. For instance, many years ago when a friend of mine and his wife were having issues he asked if he could stay with us for a while and I let him. After a few weeks he returned to home and things went ok. But one night he called and told me they’d had another big fight and that he’d been seeing another woman. My response to him was simple: “What you did was wrong and you lied to me as well. I will have no part in aiding you. You are not welcome in our home, and do not call.” I have maybe spoken once to him in the ensuing 25 years. How can someone maintain a friendship with a person that actively assisted in causing another person pain? What kind of person finds that this okay?