If the boss's spouse is the head of HR, that's an indication the company is so small that there would be no other independent manager at the same level to be able to pass concerns to, even if the law requires an alternative procedure. That's the downside for working in family companies such as this.

The only practical answer would be to quit and find a better position elsewhere, if only for the sake of your sanity. If you can get a good lawyer to pursue a remedy for you, so much the better.