SOUTHLAKE — A dispute at a Chick-fil-A involving a couple and three men in a Bentley escalated into a brawl that left a woman with a busted lip, police said. No one had been arrested as investigators tried to sort out the details. The woman, whom police did not identify, was treated at the scene, police said Sunday.The couple had just made a purchase at the drive-through about 11 a.m.