In 'Mr. Peeper's' infamous Volume 94, scene 2, a brother and sister, bored and alone, find themselves drawn to self-pleasure. She fingers her wet pussy, he strokes his thick cock, both trying to stay quiet. Caught red-handed, they argue, but soon, their desires take over. Naked and horny, they masturbate openly, fantasies of each other's bodies consuming them. Just as they're about to give in, a sudden intrusion halts their incestuous encounter.