I do not own Harry Potter or any of the characters. They belong to J.K Rowling.
Battle of the Department of Mysteries June 17, 1996
The first time had been pure luck. Bellatrix was about to torture the Longbottom boy when the Order showed up, her lip curled up at the thought of the retched Mudblood lover group. Her dearest niece was the first to show up and she had jumped immediately at her aunt, wand drawn and a small smile on her face. Bellatrix had leapt away, her own crazed smile forming into a sneer.
"Aww Wittle Nymphadora, have you come to see your Auntie Bella?"
Tonks merely cast a shield against her aunt's spell and offered an easy reply.
"Yes, Aunt Bellatrix, I've come to see you back off to Azkaban."
Bellatrix laughed, shrill and grating against to the younger wizards in the room but Tonks did not react and instead cast another charm at her, missing by inches. The duel could have lasted no more than a few minutes before Bellatrix gained the upper hand, forcing the young auror up against the wall.
Bellatrix's eyes were gleaming as she pondered what she should do to her younger sister's daughter. Oh the possibilities, she thought with a thrill as she looked over the young woman's bleeding and bruising body. Tonks was holding her side but glaring defiantly up at her aunt, dark eyes glittering in anger. As Bellatrix raised her hand to perform the Cruciatus Curse a jet of red light passed millimeters from her left ear, hitting the wall and sizzling a black spot in the stone. Bellatrix turned with a snarl and her eyes snapped onto another prey, this time in the form of her younger cousin, Sirius Black. Her mouth once again lifted into a smirk before turning back and knocking the girl unconscious with a simple spell. As Tonks' body crumpled to the floor Bellatrix sprang at Sirius.
Yes, Bellatrix thought later, her niece had certainly gotten lucky. Her cousin on the other hand, had not.