Supportive, and help out of shaming. If I'm out at a bar, or party (when I was younger), and the girl I was with would be picked on, even in a friendly way - my goal is to support her and comfort here, to turn it around and help instead. The only point of shaming, IMO, is when you obviously want to hurt someone. And who in the world would want to hurt their wife or girlfriend? Why would a wife or girlfriend want to hurt their boyfriend/husband?
But yup, I would advise anyone to get out from underneath something like that before it even has a remote chance of getting worse, whether a man or woman on the receiving end.