Dean smiled at Lily's warnings to stay off the streets at night. "Hey, I'm from London. A little crime is nothing. Just so long as they're not Death Eaters." A part of him hesitated. What if some Death Eaters got pulled into the city too? Lily didn't seem too worried, though, so Dean assumed none had (yet).
"I can tell you about parts of it. Anything that's been happening recently, though, I couldn't tell you about. I've been on the run since August, ever since Snape became Headmaster an' made it a rule that no muggle-borns are allowed at Hogwarts. Y'see, my dad left when I was born, but we've got no idea whether he was a wizard or not," Dean explained, "and without any proof to show the Ministry, well they'd throw me in Azkaban."
Dean stopped talking there. He didn't want to get into the full story while they were still out in public. Plus, he figured it was a lot for Lily to process. Hadn't Harry once said his mum was muggle-born? "Anyway," he went on, "the rest can probably wait 'til we get to this center or whatever."