Damon had gone to see the show to support his friend and he had enjoyed it, even if he had been a bit distracted by the presence of his girlfriend who looked so stunning in that dress and who was leaning in close to him throughout the entire performance. She was too distracting for her own good.
When the show was over he stood up and took her hand, leading her out to the gala. In his eyes she was by far the most beautiful person in that room. In fact, Elena was the most beautiful person in any room as far as he was concerned. "Have I mentioned how stunning you look in that dress?" he asked, as he got them both a glass of champagne.