In the intimate, dimly lit dungeon, Rella's futa cock throbs with anticipation. Her CEI training begins as she lubes up a thick, veined dildo, mirroring her own massive shaft. She moans, her ass clenching, as she slowly pushes the toy into her tight, hungry hole. Her dom, a stern but caring voice, guides her, 'Relax, take it deep.' Rella's breath hitches as she obeys, her body trembling with pleasure and pain.