Narcissa watched Andromeda fall. The body came nowhere near her, as she had stepped aside before even uttering the Unforgivable. For a moment- and only the tiniest of moments it was- Mrs. Malfoy felt pleased. Not only was Lucius avenged, but she was now stronger than he was. She had finished a job that even he could not, and the woman felt like an empress. Andromeda did not move.
It only took a few moments of heavy silence, though, for Narcissa Malfoy to realize what she had done.
Though the hours of climbing to insanity had been long and arduous, taking the widow through layer after layer of pain, delusion, and newly-discovered truths, she was back to reality with a single flash of green. Her body tensing and cold, Narcissa began trembling again, wondering in earnest if the sweat that bathed her body would freeze. Why was there no noise? Still, Andromeda did not move.
Instinctively, Mrs. Malfoy looked all around her to see if anybody had witnessed what she had done- the daughter, the wolf, an Auror. Merlin, ALL of the Aurors could have gathered behind her, and Narcissa had been so blinded by sorrow and rage that they would have gone unnoticed. Suddenly, though, all of those overwhelming emotions had been expelled as an overflowed balloon bursting to shreds, and Narcissa stood alone with her dead sister. Forever, Andromeda did not move.
Panic swept over Mrs. Malfoy anew, but for entirely different reasons than before. The laughter had silenced, Narcissa had won, but soon all of the hunters of the real world would be after her. Before, she only needed to face the demons in her head. They would find her, keep her from her son, she would never see Scorpius... and worse fates still awaited the murderer of someone so well-loved. Damn, why were there people who still found Andromeda to be worth something? They would mourn her and pursue her killer, there was no doubt. The Malfoy name would be destroyed forever, and after so much repair! Narcissa screamed at the ceiling, mourning herself and not Andromeda Tonks.
Mrs. Malfoy had to run.
Charging frantically through the room, using her wand to rearrange and cleanse everything she thought possibly incriminating, Narcissa weighed her options at lightning pace. Though it ached deep inside, the woman knew her son would not be the one to go to.
Seeing no other option in the moment, she Apparated to Upper Slaughter once more. If she were lucky, its ravaging would be over, and her remaining sister, Bella, could help her survive... that is, if there existed anything worth living for.