While my girlfriend was asleep, I touched her big tits and jerked off. When she found out, she got a hold of my secret and started blackmailing me. She secretly turned me into her toy, touching my crotch, giving me titty fucks, and eventually inviting me to full-on sex. I care about her, but I can't resist the temptation of this aggressive sister. With my girlfriend, we only have condom sex, but with her, bareback is allowed and creampie is totally okay. Even though my girlfriend is right nearby, the feeling of bare skin is so good I can't stop thrusting.