You just have to have something to aim for with your spouse, or you do get bored. Currently where I live, i see families working in the family business all the time and they really are forced to be together working on something.
Whereas their children just want to move from the provinces and live in an apartment with a spouse and they are miserable, because they don't have something to work together with.
They think having the house, the wife and the car is enough. It isn't. It's just the recipe for a midlife crisis after you get all of those things.