"Much better," Bellatrix all but cooed, although the words were lost in the sound of Remus's screams. She left the curse on for another minute or two, just enjoying the sound of his agony with her eyes half closed in an expression that would have been beatific were it not for the scene before her. Then, finally lifting the spell, she moved to stand behind Remus and drew a silver knife from her robes. Now that they had broken him, the real fun could begin.
One arm wrapped around his shoulder, her fingers curling loosely around his neck, she flashed the gleaming blade before Remus's eyes before leaning down and beginning to slowly draw the edge up his chest, cutting through his shirt and into his skin. It was not deep enough to cause serious damage - or at least it would not have been were it not for the fact that silver and werewolves were anathema to one another, but Bellatrix did not know just what sort of torment she was providing. Her intentions were just to cut deeply enough to make him bleed and suffer and as she continued to draw her slow and careful line, she looked up at Sirius with a smile. "The cruciatus certainly has its purpose," she explained, although her tone was more reverent than clinical. "One that I am quite fond of. But sometimes more physical damage is called for. There is a fine art to torturing another person. You do not wish to overwhelm them so that they lose consciousness or die too quickly. It is enough to simply spend some time reminding them just what you are capable of inflicting."