My stepsister Rima suddenly appeared after my father's remarriage—a stunning beauty with both face and figure ranking SS-class! She acts sweet and well-mannered in front of my mother, but in reality, she's an outrageous nymphomaniac who gradually seduces not only me but my father as well! What's more, she's a total pervert—despite my mother being nearby, she forcefully performs intense cunnilingus on me, cums wildly on her own, and keeps orgasming repeatedly until she's completely satisfied, indulging in utterly outrageous behavior.