So what if you can't recite your vows after all these years. You remember the gist. “For better or worse. In sickness and in health. In accounts payable and receivable.” Wait. What was that last one? Doesn't sound familiar? Well, if you and your spouse share ownership and management of your company, it should. So says the current thinking about the newest and fastest-growing segment of small business óentrepreneurial couples or “copreneurs,” if you want to sound in the know.