A/N first installment :) Please read and review!
Disclaimer: Not going to copy this to every chapter because it's kind of obvious but... I do not own, or claim to own, Harry Potter or anything to do with it. I only own my random little ideas :)
This idea came from... wondering why loads of blood traitors were hunted down for being blood traitors but Andromeda Tonks (nee Black) never was.
Once the Dark Lord had departed, Narcissa Malfoy hurried over to her sister, Bellatrix Lestrange, before she, too, could leave Malfoy Manor. She caught onto her slender wrist and, when Bella turned to see who it was and what they wanted, she indicated with her blue eyes that she wanted to go into the next room where they could talk without fear of being overheard. Then she turned and headed towards the door, not checking to see if her sister was following.
"What is it, Cissy?" Bellatrix asked as she shut the door behind them. Narcissa turned to her, blue eyes full of emotion in contrast to Bella's cold, black ones.
"Andromeda." She answered, simply. Bella frowned, and Narcissa spoke up once more before her rash sibling could reply. "No matter what she's done in the past, she's still our sister. She's still family." She finished softly, her eyes full of pleading. It was only this past year or so that the importance of family had really hit home, after the Dark Lord had marked Draco and ordered him to kill Dumbledore. Seeing how he had suffered, and fearing that she would lose her son, had made her realise how stupid everything was. What did it matter, all this blood purity? It was nonsense spouted by a hypocritical old fool! Of course, such thoughts could not be voiced when said fool was using one's home as a base. It was risky enough to even think them what with his skill as a Legilimens. She hadn't told Lucius how she felt, and she certainly wasn't about to tell her sister who was, after all, the Dark Lord's greatest follower. But she couldn't resist trying to save Andromeda.
"Cissy, she married a mudblood!" Bella shook her head in disbelief. "She disgraced the Black family name! She's a blood traitor!"
"I know, Bella. I know." Narcissa shook her head. She didn't really know that at all. She had come to hate the way she had just followed her family in disowning Andromeda, but what she did know was that Bella would never see things the way she now did. "I know that, and I understand. But Bella, she's our sister. You would kill one of our own?"
"I already have, Cissy!" Bella cried. "I killed Sirius!"
"I know." The youngest of the sisters said softly, attempting to placate the oldest. "But Sirius was our cousin. Andromeda is our sister." She noticed Bella shake her head in disbelief and open her mouth to retort, but Narcissa raised a hand and spoke before the retort could be made. "Please, Bella." I beg you, she added silently. Blacks never begged, and neither did Malfoys. But the effect was there. Relief flooded through Narcissa as she saw Bella's cold eyes soften the slightest bit. That was when she knew she had got through to her.
"Alright, Cissy. Andromeda will not be hunted down." Now it was her turn to hold her hand up to silence her sister from replying. "I cannot say the mudblood she married will be granted the same lenience. Nor their werewolf-marrying spawn!"
"Of course, Bella. But not Andromeda."
"No. Not unless she gets in the way." The coldness was back in the eldest Black sister's eyes now.
"Thank you." Narcissa spoke softly, and Bella responded with a simple nod of the head before turning and leaving the room.