It began with the twitch of her lower lip as it took on a life of its own, rippling outward to the corners of her mouth and forcing them upward into a helpless smile. She instantly clasped one hand over her mouth in a frantic attempt to silence the sound that was coming from her throat. The result was that she half-spluttered, half-coughed, her eyes painfully wide as she desperately wished a hole would emerge in the oriental carpet and mercifully swallow her up.