Author's Note: This flashback is from Ch. 3. When and where it takes place is obvious, haha.
Malfoy Manor
Bellatrix's eyes fell on Gryffindor's sword, and she stopped Lucius from summoning Voldemort. Hermione couldn't keep her eyes off Draco as Bellatrix gave orders for Harry and Ron to be taken down into the dungeon below. Draco was pointedly looking at anything in the room except Hermione, and she finally tore her eyes away—it would do no good for them to be caught just because she wanted to look at his face.
Then the Snatchers collapsed to the ground, Stunned by Bellatrix, and Draco was ordered to take them outside and leave them to be dealt with later.
"Where did you get this sword, Mudblood?" Bellatrix demanded.
Hermione stayed silent.
"Crucio!" cried Bellatrix.
Hermione's knees buckled, and she writhed on the floor in agony. Before she knew it, she was screaming at the top of her lungs, the pain unbearable. Then, it was over, and she curled up into fetal position.
"Tell me now. Where did you get this sword?"
Still Hermione didn't say a word, and she was rewarded with new waves of pain. She twisted around, clawing blindly at the ground, wishing for a way to escape this pain.
Bellatrix's high-pitched laughter filled her ears, and then the curse was lifted.
"Draco, dear boy, why don't you have a go?"
Hermione managed to look up. Draco was standing in the doorway. His eyes passed over her briefly, and then he walked to his aunt's side. Hermione saw Bellatrix beaming in approval as Draco pointed his wand at her. She looked into his eyes and knew, even though those eyes were stone-cold and devoid of emotion, that he didn't want to do this.
"Crucio," he said in a low voice.
Pain enveloped her again, but this wasn't nearly as bad as Bellatrix's curse had been. She was still able to think coherently about things other than the pain. She thrashed about on the ground, wondering how they would ever escape. Would they escape?
Then the spell was lifted. Hermione lay on the ground, limp, too weak even to curl up.
"Draco boy, you don't seem to have the heart for this," said Bellatrix. "Watch me."
"No!" Hermione cried out. "No, no, no, please! Please, don't."
Bellatrix looked elated. "Tell me now!" she crowed. "It will get much worse for you if you don't."
"The sword—it's a fake. We found it," said Hermione.
"A fake?"
Hermione nodded fervently. Bellatrix turned away and called for Griphook to be brought upstairs. Hermione was shocked—they had captured a goblin? Then she caught Draco's eyes watching her, and she met his gaze. Suddenly she felt warmer, and a soothing feeling washed over her. He must have used a nonverbal spell. She thanked him with her eyes, and he looked away, focusing on the ground instead.