the_debt_of_time

Narcissa pursed her lips at him. "Don't be crass. You, more than anyone, know the
situation I was in."
"The situation I tried to get you out of," he reminded her.
"Yes, my saviour," she said sarcastically, "a fifteen-year-old boy who, at the time,
was safe behind the walls of Hogwarts. Tell me again, Sirius, what did you sacrifice when
you disobeyed your parents?"
Sirius bristled.
"Precisely. You had Alphard and the Potters at your back. I didn't want to suffer,
thank you." She exhaled shakily, tucking a strand of blond hair behind her ear. "Of course,
looking back... Did you know she came to see me the night you were attacked? I was at
St Mungo's as well, dealing with, well, a personal issue. She was a strange comfort to me
despite how rude I was to her. I owe this witch a great debt."
"What debt?" Sirius asked.
"That's none of your concern. Words between witches," she replied firmly. "How
is she still so young? And why did I not recognise her before today?"
"Magic."
"Don't be juvenile." She rolled her eyes. "Fine. Keep your secrets, then. I mean the
girl no harm. I told you, I owe Mia Potter. Wasn't her mother a Black? The one your mother
despised?"
Sirius nodded. "Dorea."
Narcissa had a pleased look cross her face. "You'll fix it all then, won't you? Our
family? Our House? You'll save it from being lost forever."
"Busy saving the world first, Cissa," Sirius scoffed.
She smiled. "No one's called me that in a very long time. Bella and Lucius always
preferred Cissy. It felt childish rather than affectionate."
"Well, don't get used to it," he insisted as he stood, flicking his wand out and
summoning his Patronus. "I'm taking you to stay with Andromeda. Something tells me that
she'll have an alphabetical list of things she'll call you before she gets to affectionate
nicknames."