My husband has engaged in sexting with more than 20 people. I found out about his infidelity because he tried to initiate this type of conversation with a mutual friend who made him tell me. When I found out, she said she felt guilty because she had enjoyed all of the attention he had been giving her. My husband confessed that he was developing feelings for her. She is part of our friend group at our local gym. My husband does not want to be friends with her, but I'm torn as to whether I'd like to continue our friendship. How do I navigate my relationship with her, especially since we'll see her at the gym and other gatherings? There is no alternative gym that we could go to.