I recently started going out with my girlfriend, and when I went to her house, I found out that she had two big-breasted Kokoro! They were completely different from my prim and proper girlfriend. For some reason, my innocent and naughty sisters were very interested in me. Even though my girlfriend was there, they enjoyed the situation and seduced me by pressing their big breasts against me. Even though I had a girlfriend, I got a full erection. And... they were tempting me to let me cum inside them, as if they wanted to have a baby with me, so there was no way I could resist them!!