Written for Defense Against the Dark Arts on Hogwarts School of Witchcraft and Wizardry (Challenges & Assignments)

Extra Prompts "Why are you wearing a dress?"/ "Don't you think it shows off my fabulous legs?"; noble; Different House! AU

Pairing: Andromeda/Bellatrix


Andromeda mouth went dry at the sight of her older sister. Since the day Bellatrix was sorted into Ravenclaw, all the girl did was dress into blue and bronze, sometimes silver, clothing to irk her parents. And she had succeed countless times in the past, but this was too much. Bellatrix had always been a tease, so it shouldn't have been so surprising to catch her in such a revealing dress. A skintight blue and silver dress, of course, with a slit that stopped at her thighs and not to mention the cleavage she was showing...

"Why are you wearing a dress?" Andromeda asked, blushing brightly.

Bellatrix smirked and struck a pose. "Don't you think it shows off my fabulous legs?"

Andromeda hastily looked away as she felt her face grow hot. It was a reoccurring thing with Bellatrix, always flirting with Andromeda in the most embarrassing ways. She knew that it was wrong to lust for her sister and for them to be in a secret relationship, but there was something so right about it that Andi couldn't put her finger on. After how could it be right to kiss your sister in a not-so sisterly way? Or have lingering touches that set fire to your skin in the most pleasurable way possible? The Ancient Noble House of Black was known for their incestuous ways, and even their family would look down upon it. They had no reason to approve, when their relationship didn't benefit the bloodline in any way.

"Andi..." Bella purred, grabbing her sister's wrist. "What do you think?"

"About what?" Andromeda stalled, trying desperately to escape the situation.

"How the dress looks on me, of course." Bellatrix teased, tilting Andromeda's head up.

"It-it looks very nice." Andromeda managed.

"Nice? Is that all?"

By then Andromeda's face was a deep crimson that caused Bellatrix to giggle, before pulling her sister into a kiss.