Harry and Ginny had no ulterior motive when they made everyone choose names out of a hat for who they were going to be paired with for the family crafts competition. It was a tradition in the Weasley-Granger-Potter family now, and it was Hermione that had brought it in once she married Ron - having done the same thing with her parents growing up. Every year, in the run up to Christmas, the family that were present at the house on the first night of the week would create Christmas wreaths and baubles to decorate the house with. Just as they had told everyone, it was a complete coincidence that Ron and Draco were pulled to be paired together. Sure, it was a team building exercise and family bonding session, but they didn’t jinx the selection process. Except, of course, Ginny did, and she didn’t tell Harry about it because her husband was awful at telling lies.