Your friends should not have said anything to you about seeing your wife. Also, just because a man is well dressed doesn’t mean he is better. Also he may be a user that ends up just using your wife and dumping her. I question if these so called friends are people you should consider as friends. A true friend would not want to tell you things that only serve to upset you. Your wife is hoping they will report to you so you feel bad. That is what toxic people enjoy doing and get an ego boost from “ hurting others”.
Your wife is a user and anyone she is with will be used. You are better off without her. She is not and never will be the person you created in your mind that is a good person or healthy for you to have in your life.