Even though my girlfriend is right next to me... her older sister is straddling me and shaking her hips... If this is discovered, we'll definitely break up... but my Kokoro is leaning away from my beloved girlfriend and towards her older sister! A sense of guilt wells up from the depths of Kokoro. I'm nervous about when I'll be found out. But even so, I can't stop having creampie sex with my older sister, who has bigger breasts than my girlfriend, is more aggressive, and has a strong libido! If there's no turning back once we've crossed the line, let's enjoy it to the fullest! A total of 34 reverse cuckold situations!!