Your future path supports your lover's career ambitions or their reputation in such a way that makes it easy for you two to grow and progress together. If your relationship is long-term, so much the better, because you don't have to worry that one of you makes career or a personal choices that hurt the relationship. That probably doesn't happen, and if you have good communication as a couple, you're able to talk out any problems that do happen to arise.
In general, you should share visions of the future. You have an idea of where you want to be in five or ten years, and your lover is probably already on their career path, reaching toward their goals and making their ambitions become reality. You move along similar tracks, so you can help each other make your dreams come true. You help your lover in any way you can to make their career a success, and they return the favor by taking your vision of the future on as their own, and working to make it come true.