Narcissa held her wife, attempting to ignore the heart-thudding fear she had when she witnessed something unnatural come over Hermione's features. She's just been going through a lot; losing memories, dealing with stress, killing people... Merlin, no wonder she's being influenced by the Dark. She wasn't sure if the tattoo from The Dark Lord or her wielding the Deathstick were the culprit, or if the two of them together was having an exponential effect on her.