Though he would have liked nothing better than to kiss her just then, Severus could see Professor McGonagall watching them out of the corner of his eye. He didn't want Sappho to get a detention on his account, so he leant back a little when she moved forward. "Not just now," he whispered, shaking his head. "McGonagall's watching." Frowning, he looked down at her plate and added, more gently, "Are you done? Because I'm not really hungry any longer. I -- ah -- think I'd rather have you all to myself for a few hours, if you're agreeable to the idea." After another quick glance in McGonagall's direction, he risked moving closer. "I want to show you how attractive I find you," he whispered with his lips directly on her ear.