In a lavishly decorated dungeon, a dominant mistress teaches her bisexual submissive the art of deep-throating a strap-on. The sub, dressed in lacy lingerie and sheer pantyhose, eagerly sucks her mistress's harnessed cock, taking it deep into her throat. The mistress, stern yet encouraging, guides her sub's head, pushing her to take more. The room fills with the sounds of wet, sloppy sucking, the clack of high heels on hardwood, and the sub's muffled moans of pleasure and effort.