"You're dating my sister, but you're interested in me too? That's disgusting." I got carried away because my girlfriend's sister was so Ke'ai... She hugged me from behind and punished me! "You're cute for all that arrogance. You're a masochist, right?" Even though my girlfriend was behind me, she dominated my nipples and fooled me with audacity, causing me to explode. She must have really liked my dick, because she hugged me from behind, blocking her view and cheating on me. I know it would be bad if she found out, but I'm sorry I got an erection even though it was a betrayal!