if you had the opportunity to, would you tell the wife that her husband is trying to cheat on her with you?

long story short this guy was flirting with me during a rough patch in his marriage for a couple of months. I had no idea he was married. he offered to take me out to a restaurant but little pieces of evidence was appearing here and there that seemed like he was hiding that he was in a relationship or even married. it took a couple of months for me to give him a chance and go out to eat. he was flirting with me when we went out. [repost] he told me that I was a really sweet person and needed to know the truth -- he was married. I was so shocked that I guess I couldn't stop smiling and was at a loss for words. I told him that I felt bad for his wife bc she is probably worried. he told me she wouldn't be bc we were just friends hanging out. he told me that during a rough patch in his marriage, I came along. he said he just wanted things to end already but then also said that things got better and he didn't want me to judge him or hate him. I was so shocked and confused. he said that I was a really sweet person and that he knows the guy who comes along for me will be very lucky. I think he said these things because I had a look of shock on my face the entire time he said this and I was smiling like whaaat. he still wanted to be friends. [new] I am kind of good at investigating and found his wife's instagram. if you had the opportunity to, would you tell the wife that her husband is trying to cheat on her with you? if I did say something to her, the guy might know it was me who messaged and come after me. he knows where my parents live!