Wife Unaware Do You Warn Her Or Let Others Enjoy The View

Some lookalikes of my wife where she is unaware and suffering a wardrobe malfunction or accidentally showing too much. Do you warn her and save her any embarrassment or say or do nothing and let other guys have a good look at her knowing just how ashamed and humiliated she would be if she knew?! (Not my photos so all credit to those who originally took and posted them).