After the neighbourhood renovation a few years ago, a bunch of small businesses moved in at once. Marge's Cafe was one of them. Carlo's Bar & Grill was another. Being just a few doors away from one another, the two of them were natural competitors for the daytime clientele. The rivalry got fierce, and eventually Marge and Carlo started pulling underhanded stunts to steal each other's customers.
Things came to a head when Marge went a little bit too far, and Carlo caught her flipping the "Yes We're Open" sign on his bar's door around just before the lunchtime rush. That was too much for him, and she was caught in the act with no excuses. All she could do was start shouting and hurling insults back at him, and in these circumstances that was more audacity than he could bear. He dragged the struggling Marge inside and let all his accumulated frustration out onto her generous bottom over the course of five full minutes of furious spanking. And then into it with the nearest foamy, ice-cold beverage on hand.
They came to a bit of an understanding after that. Specifically, they're married now, and both of their incorporated establishments are places where you really want to stay on your best behavior.