This relationship will be nothing if not unusual, and it could be so unusual that neither of you can ultimately handle its unpredictability. There will be a very challenging, competitive energy that grows between you, pushing you to provoke each other on a regular basis regarding your work, your behavior, your goals and so on. Furthermore, you'll both find it hard to let things roll off your backs in this relationship; when your partner does or says something to you that provokes you, you'll want to address it immediately.
You'll have a hard time creating balance, which will in turn make it difficult to create any sense of stability between you. You may also have to add outside pressures into the mix, especially if your connection is outwardly so odd or hard to accept that your friends and families actively disapprove of the relationship. Above all, don't try to subject this affair to any of your usual standards or expectations. If you care about each other and want this to last, the only way to make that happen will be to give each other plenty of freedom as well as support, and let the relationship follow its own unique course.