It was nice having someone that cared about him, not because they thought he was talented or handsome, but because they genuinely cared about him. He didn't have to second guess Lucy's intentions or suffer through constant blows to his ego with her because they could be honest and sincere and...
Roger now had to lie to her. It wasn't because he didn't trust her, but talking about his mother and what she was really doing right then wasn't a good idea in a public place. "Oh, you know. She took some time off from the Ministry." Which wasn't a lie. "So she's good." Okay, so it was more of a lie of omission rather than an outright lie, but she could probably tell that something was up by the way he was acting a little shifty.