But as Malfoy's anxious mother Narcissa pointed out in the early "Half-Blood Prince" chapter, "Spinner's End," it still doesn ...
Harry Potter and the Half-Blood Prince's Unbreakable Vow plotline ... Severus Snape made the Unbreakable Vow to Narcissa Malfoy at Bellatrix Lestrange's suggestion. It was meant to ensure that ...