Uranus in the Composite 7th house:

With Uranus in the 7th house of intimate relationships, marriage and partnerships, there will be very little that is conventional about your relationship. Uranus loves to disrupt the status quo, striking out in new and wild ways in order to express itself. At the very least this placement of Uranus will present difficulties unless the two of you are used to doing your own thing anyway. If not, you may not be able to handle the freedom and perhaps new age morality side of Uranus in the 7th. There is nothing traditional about Uranus and the notions that you have had about marriage may go right out the window. Usually in marriages with Uranus in the 7th house, it indicates a short-lived and very unstable relationship. This goes for business partnerships and close friendships as well. Unless you can give each other a lot of space and freedom in all activities, your relationship has little chance for survival.

You can use this energy constructively by working on projects that require unusual, far-out, unconventional or new technologies. But even here you need a lot of space in which to operate.

That's from the Composite Report

I'll add that a relationship with a composite 7th house can be off and on. Even if it's stable, the couple will go through upheaval, needing the reinvent their partnership, frequently.

Do you have Uranus in the first house of your composite chart?  How's it play?