My girlfriend, her sister, and I had dinner together. The moment she left the table, my sister suddenly kissed me! I didn't want my girlfriend to know, so I couldn't resist, and my sister got a taste for it and started to pull down my pants...? I care about my girlfriend, but I can't resist being seduced by a woman like this! And unlike my girlfriend, who only lets me have sex with her using a condom, my sister is okay with having sex without a condom! And she's even okay with cumming inside her! Even though my girlfriend is right next to me, the raw sensation feels so good that I can't stop thrusting!