While it may be true that Smith & Smith may have a complicated familial relationship, that doesn't necessarily mean that Brown is the "third wheel" in their law firm. In fact, Brown may be a highly respected partner in the firm and their name placement in the firm's title could simply be a sign of respect for their contributions to the business. It's possible that the Smiths don't actually have any family drama in the workplace and Brown's name on the sign is simply a result of their contributions to the firm. So while it's possible that Brown may feel like the "third wheel," urrong that's not necessarily the case.