While I was doing something naughty with my girlfriend at her house, her older sister suddenly came in! That's when she noticed my huge dick! She showed me her boobs, which are many times bigger than hers, and seduced me! I care about my girlfriend, but I can't resist being seduced by an older sister like this! And unlike my girlfriend, who only lets me have sex with her using a condom, my older sister is OK with raw sex! And she's OK with cumming inside me! Even though my girlfriend is right next to me, the raw sensation feels so good that I can't stop thrusting!