In the throes of her forbidden lust, Rias welcomes the monster's massive, oil-slicked cock into her tight, dripping pussy. She moans, her nipples hard and sensitive as the monster suckles them. Issei, hidden, watches as Rias spanks herself, urging the monster to fuck her harder. The room fills with the sounds of their flesh slapping, Rias' wetness, and her cries of pleasure. Issei's heart races, his own cock straining against his pants as he witnesses Rias' taboo desires unfold in a creamy, sloppy climax.