Dumbledore was already dead and in the ground rotting. Voldemort had tasked her with getting the elder wand. She opened Dumbledore's tomb. The man was ancient. Some of his skin had rotted away, some of his bones were showing. Maggots and raw sinew. The smell was overwhelming. She had switched sides two years ago. After it happened. After everything she had worked for had crumbled. There was no point to fighting. He would win. She would make sure of it. They had betrayed her. They had shattered her trust into a million pieces. They ruined her life.
Slowly, one by one the order fell. First Dumbledore, then Moody, then Remus and Tonks. When she was on the side of the light their deaths hurt. Not anymore. She reveled in their pain. She loved it. She had spent many a night with The Dark Lord laughing at the look on Harry's face after each death. She did feel a little guilty about Luna and Ginny. They were her besties.
She snatched the elder wand from Dumbledore's hand and shuddered at his cold body. It was like ice. The cold December air bit into her skin. She had to hurry back to Him with her prize. She apparated with a pop. She stood at the edge of Malfoy Manor and walked with her prize toward Him.
He was sitting in his chair in black robes. His slits quivered. Bellatrix was jumping up and down with glee. She used to hate the woman. She did after all carve up her arm with the word mudblood. All water under the bridge now. She bowed as she approached.
" Come here pet. Show Master your prize" Voldemort said.
She handed him the wand. He smiled in triumph. He was pleased. She used to think he was hideous. There was still a part of her; albeit a very small part that was still repulsed by him. She knew what was in store for her reward. When she performed well or had slain another order member He rewarded her. The rewards were sweet indeed.