>Cartoon creator marries girlfriend
>Gives wife role in his cartoon
>Cartoon doesn't immediately go downhill as creator is forced to change everything to fit wife's far-left political agenda
>Creator and wife stay married for 25+ years and the cartoon never loses quality or betrays original premise

How did Matt and Missy do it? In literally every other case of a creator getting his girlfriend/wife involved with a show/comic, the show/comic is utterly destroyed by the girlfriend/wife. But not this time.

What happened?