SSIS348 — Adult Role-Play: ``She's naive and extremely sensitive to pressure.'' I was lustful for her sister, and secretly kept having sex with her.

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This role-play is performed by adults. Which would you choose: "A small-breasted girlfriend who is strong at pushing" or "A girlfriend with big breasts who is weak at pushing?" I started thinking this way shortly after I started dating my girlfriend. Although she is proud of herself, she is very guarded when it comes to sex (lol). On the other hand, my girlfriend's younger sister seemed quiet and timid, and I was at the limit of my horniness, so I ended up touching her big breasts...huh! I don't strongly resist it (lol). From there, I decided to have sex in secret with my younger sister, Nanami-chan, who can have sex and is also super sensitive!