Narcissa had always been the rising hope of House Black. Or rather, as a girl, it was her direct duty to continue the lineage, albeit under the banners of another family
She was calm, understanding, gentle. Better than Andromeda, who had become a traitor to the family in the first place, and better than Bellatrix, who was a pure-blooded fanatic, with centuries of blood mixing clearly slowly affecting her mentally.
Narcissa got the best of everything. Including Lucius - who will definitely be her future husband - who is also good. He loves her sincerely, deeply, and considering that love is a rare thing in pureblood families, she's lucky to have him.
And everything would have been fine. Her life would have to go according to this beautiful and ready-made scenario where she would become the mother of Lucius' children, be meek and humble, support Dark Lord , and it would be a lie to say that this scenario didn't give her a pleasant warmth all over her body.
But there was something else. Someone. Someone who, by the mere sight of them, was crushing all her hopes and plans, and Lucius, who was definitely already waiting for her on another date, seemed like some kind of unnecessary prop.
"Lost the parchment with the dark arts assignment? What a silly girl you are," Narcissa's eyes starred when she said that, and she giggled. Her mind instantly goes all mushy and she wants to stay with you. Preferably forever "Let me help you. Where'd you lose it?"