So far this was an entirely normal conversation. Between two people talking about movies, nothing else. Interesting. Draco watched her silently, debating selecting one of the films, then went with an answer that he thought she wouldn't expect. "How about you choose?" Draco asked quietly. "I...know absolutely nothing about this sort of thing and likely would pick something rubbish."
He could be nice, too. Draco was making an effort, if nothing else. He took a chance by respecting her choice, acknowledging what he knew about her family and going with it. It was no secret, after all, that her father was fond of Muggles.