My girlfriend has small boobs and is passive when it comes to sex, so a condom is a must... Her older sister is the complete opposite!! She has big boobs, is very sexy, and seduces me by saying she's OK with raw sex and creampies!! I feel guilty when she seduces me, but I can't resist and I ignore my girlfriend and do all sorts of fun things with her! The thrill of being found out by my younger sister makes me excited and I get a full erection! Even though I do get found out, it feels so good I can't stop and end up having raw creampie sex with my older sister right in front of my girlfriend!!