In which the Weasley's cousin, David arrives.
“David, dear,” Molly said enthusiastically. “Come in, come in. Don’t just stand there.”
   He came inside and sat his bags down carefully on the floor, opened his arms and said, “Come on, Aunt Molly, give me a hug!”
   Molly hugged her nephew tight and soon pulled away to let him greet the rest of the family.
 He grinned at his cousins who looked back at him awkwardly. “Come on, you guys! Give me a hug!”

In which Hermione and David have their date...
 I believe you,” she said. “So, um, can I ask you a personal question?”
 "Sure,” he said. “Why not?”
 “Are you a virgin?”
  David laughed. “Yes, actually. Fred and George seemed to think I wasn’t one either.”
 "I’m sorry. But I think it might be the leather jacket,” she said.