The Happy Couple

In the future, couples wishing to marry will be able to create a pair of clones to test their relationship.
While the clones are married and live out their lives, the original couple is deep-frozen and stored in hibernation chambers.
Should the marriage fail, the clones are destroyed and the couple is thawed out so they can break up and go their separate ways.
But if the marriage holds, well, they live out their lives happily ever after.
Of course, the original couple ends up being destroyed.
Love can be weird sometimes, sure, but why ruin a good thing, right?