Can there be two careers under the same roof?

The common nowadays couple is often made of two career-oriented people. Nevertheless, due to the amount of time each of them has to dedicate to their profession, the risk of endangering the future of their relation is quite high.
But what if you find yourself in the middle of a wonderful relation and both of you have a wonderful career to follow? Is there anything you can do to prevent a disastrous break-up or to avoid competition?
Unfortunately, there is a certain category of persons who are so interested in their professional life, that they become absolutely rigid and inflexible, when it comes to a love relation. These persons, possessing great professional ambitions, have in common a series of qualities which make them so needed at work: they are always ready for competition, they have leadership qualities, but they can also follow rules and regulations. They live an exciting life and since they don