If not, one way to try to create a win-win is to help the employee find a new job (if that is what she wants). Dating an owner can reduce a talented professional to being considered “the boss’s girlfriend,” which can inhibit her colleagues’ trust and the flow of information, torpedoing work collaboration. If she agrees that it would be best for her to move on, ask people in your network if they know of an equivalent—or, ideally, better—position at another company. (But keep your clients and vendors off the list of prospects—that’s just another ethical mess waiting to happen.)