"Don't you find it odd that Harry Potter and a handful of students were able to catch Lucius and other Death Eaters at the Department of Mysteries? Seeing as Hermione is considered the brains behind the so-called "Golden Trio', and she was safely taken out of the fight by a non-lethal spell just before Narcissa's cousin, Sirius Black, was killed. It's too convenient, if you ask me. Plant a loyal House-elf, keep tabs on the under-aged witch you fancy, and send the young heroes off to help you get rid of your husband."