when i went to my girlfriend's house to play, her big-titted sister greeted me in a see-through babydoll. and the sister was super horny! she would seduce me anytime, anywhere, taking advantage of my girlfriend's absence. i care about my girlfriend, but i can't resist such a seductive sister! unlike my girlfriend, who only lets me have sex with a condom, her sister is okay with raw sex and creampies! i can't stop cheating with her sister, even though my girlfriend is right next to us, the feeling of raw sex is too good to resist!