How do you catch a trucker husband in the act of cheating?

As with all such problems, you must actually be there. A private detective is expensive but can bring results. If you're absolutely positive that cheating is occurring, then it's probably worth the investment. Shop for P.I.'s as you would a plumber-- get 3 estimates... unless, of course, you are limited otherwise. Truckers have earned their motto of "A woman at every truck stop", but this does not mean all truckers are like this. If you are absolutely sure that your husband is goofing off on you either hire that detective the other poster mentioned or follow him for a couple of hundred miles yourself. It doesn't take long before you would catch him in the act if he is cheating on you.