The sisters, their eyes downcast in pious obedience, stand before their father and stepbrother in the dimly lit chamber. The air is heavy with the scent of incense and their own nervous sweat. As they lower themselves onto the waiting cocks, their bodies tense, then relax as they take in the hard length. The room fills with the lewd sounds of their hymens stretching, their wetness coating the shafts. The father watches, his voice stern yet laced with desire, "You mustn't move, my children." Yet, their bodies betray them, hips moving in sinful rhythm, their voices rising in ecstasy and remorse.