My friend brought me a green hat, and I said in a circle of friends, is it good for me or bad for him? Will others stay away from him, or will others laugh at me?

Your friend cuckolded you. You'd better not say it in a circle of friends. It's not good for you or him. People will laugh at you as well as him. You'd better talk to him. Is this immoral? It's good for you and his family to keep him away from your wife and give consideration to family and face.