Even if you're not married, you better know the answers: Which spouse has the right to run the business? Is it OK to hide business finances from your spouse? Do you need both spouses to sign a contract? Can you lose business ownership if you get married? Who owns the business if a spouse dies? Will unfaithful spouses lose their business ownership? Do you need a Prenuptial or Postnuptial agreement? Couples together 7 years -- are they married by law? Join…