His Obsession

Warning: Dark Romance. Severus is extremely manipulative and cruel. If you don't like that, don't read it.
Aurora Black is the twin sister of Sirius Black. Other than their curly black hair, pale skin, and grey eyes they couldn't be any more different. Aurora is quiet and reserved, where Sirius is loud and boisterous. As children they had been very close but over the years, house rivalries and politics of the wizarding world, has driven them further apart. Severus Snape is a promising recruit of the dark lord and despite his current student status, he has gained the dark lord's favor. He gets tasked with managing Aurora by any means possible, so that she would be swayed to accept the dark lord's offer to join his cause. However, Snape has had a burning desire for Aurora that he has kept hidden over the years. He uses the dark lord's permission to enact his darkest fantasies and make Aurora his.