I think that’s a pretty easy one.
Use the gas pedal to drive away and call the police.
Making your decision based on teaching the other person a lesson is almost always going to result in making the wrong decision
As a bonus, having them not realize what’s happening when you go call the police could mean the police show up and catch them red handed with gun right there and they learn more than they did from you risking your wife’s life hanging around making them mad