Disclaimer: Harry Potter belongs to J.K Rowling and I wish it to remain that way.
Bellatrix duelled with the three young girls. She wanted to repay Granger and Lovegood by escaping the Manor and she getting the blame, and also for breaking into her vault! She saw the red-head Weasley girl using more powerful spells, so Bellatrix fired the Killing Curse at the young, foolish girl. It missed her by inches. Bellatrix growled in frustration before hearing a challenge arise.
"NOT MY DAUGHTER, YOU BITCH!"
She spun on the spot and saw the foolish girls mother. She, humble Molly Weasley, think she can take on the powerful Bellatrix Lestrange? It was so laughable that Bellatrix roared with laughter, but then the woman took out her wand and duelled.
Bellatrix snarled at the woman, for thinking she could overpower her? She was trained by her Master, how could she not win? But Bellatrix had to admit, she was a bit impressed with the duel. But Bellatrix shut that thought out of her mind, she was fighting to kill. Kill the dirty Blood-Traitors and Mudbloods was her only wish, and of course by her Master's most faithful servant. She saw other students running forward to help the woman, but she just threw them away.
"No! Get back! Get back! She is mine!" That only made Bellatrix fight harder to kill the woman who thought she could defeat her.
"What will happen to your children when I kill you?" taunted Bellatrix, while flicking her curses away. "When Mummy's gone the same way as Freddie?"
"You-will-never-touch-our-children-again!" she screamed.
Bellatrix couldn't help it, she burst out laughing, the same exhilarating laugh that sends shivers down everyone's spines. She foolishly forgot about duelling, laughing at the woman's poor attempts. Bellatrix suddenly saw a curse heading her way, going under her arm and hitting her heart.
She stopped smiling. She refused to believe it. She wouldn't be defeated by her! But then she felt very dizzy, and she toppled to the ground and everything turned black.
Bellatrix Lestrange was finally defeated.
Just a small one-shot I thought of. Rate and Review. :)