I come into your room asking to use your laptop, you make me beg but eventually cave in. I start browsing the web and come across some porn videos you have bookmarked and tease you about your creampie fetish. I ask if you've ever cum inside a girl before and you confess you haven't but really want to. I ask if you've ever thought about me that way, and you admit you have had thoughts about filling your own sister with semen. I'm hesitant, but also turned on by the idea and you convince me to let you put the tip of your dick inside me to see how it feels. I can't believe you want to cum inside my pussy, it's so wrong but also so hot! You gently hump me missionary while I talk about how good it will feel to plant your seed deep inside my warm, wet pussy. You end up cumming quick and I offer to let you go again. You push the huge creampie even further inside my hole while you pound me harder this time. You fill your sister again with another big load of sperm and I hurry out of your room before our parents catch us.