During a Malfoy dinner Lucius started talking about how Vela should be a death eater even though she’s only fifteen and then when she’s in her room she gets a letter from Sirius Black saying to get out of the house immediately to go somewhere safe and then she wrote a letter to Draco and after that she slid the letter under his door and left but before she left she sent a letter to Molly Weasley saying that she needs a place to stay and she said she can stay at the burrow and she went to the burrow