This is a truly spectacularly and sinisterly sexy scene. At first casual glance, you might care to ease your mind and think that the subjugate has been placed in an enslaving trance by the superior Succubus and involuntarily having her essence sucked out and substituted with something else. On second look, however, the subject has that sense of a willing volunteer. As if she sought out and pleaded with the demoness devourer to do her worst and make a new bad girl handmaiden be her best.