and until it becomes serious , and you 're engaged or married-not that i 'm saying that will happen , '' carla said , holding up a hand when michelle 's eyes threatened to pop out of her head because clearly she and jack were never getting married , let alone going to date beyond thirty days , `` -you simply need to be chaste in public , but behind closed doors , '' carla said , lowering her voice to a conspiratorial whisper , even though it was only the two of them in her office , `` feel free to have some fabulous sex . ''