Aw, babe, this is fabulous. I have to admit I put off reading it because I thought it was actually about a Crup show. And, yeah. *ashamed*
Narcissa is one of my favorite under-utilized characters in fandom. I adore her so much, as a mother, wife, and pureblood. I love how you mentioned she left her wand with Draco, and I loved the moment when she became aware that Severus knew his life literally rested in her hands and she still made the right decision.