Kissing Cousins

"Sirius hated the look on his cousin's face." Bellatrix, condemned to an abusive engagement, has changed far too much for her cousin's tastes after the news, and is in a downward spiral no one can seem to pull her out of. But Sirius finds there may just be a way, and he's more than willing to fulfill the role she needs him to play. Blackcest, Cousin Incest, Sirius/Bellatrix