These Violent Delights

Severus Snape never meant to survive the war. But when a former student saves his life out of anything but altruistic motives, he has no choice but to return to Hogwarts. Instead of peace and quiet, Cora Thorne awaits him, ready to make his life as miserable as he made hers. Their mutual hatred knows no bounds until something unexpected happens. Snape lives, post-canon, SS/OC