Would It Help If You Thought I Was Your Step-Sister

(Joe Dirt Parody) I met this smoking hot girl today and invited her out on my boat. She was extremely excited and appreciative for me taking her out because apparently her foster step-parents don't let her leave the house. As we get ready to leave she asks me if I'd want to take her home, and fuck her. I immediately jump on that idea and we head back. On the way there she can't even wait so she has me pull over so she can suck my dick before we even get to her trailer. Then it all went bad. I asked her more about how she became fostered and I think that she might actually be my step-sister. So I hop out, lock the door, and leave her on the side of the road. A few days later I show up at her trailer to explain what happened. Apparently both of our stories about how we became orphaned were exactly the same, and so I think she IS ACTUALLY MY STEP-SISTER. She reassures me that there is no chance at all, and we pick up where we left off. She sits on my fat cock, and then she notices that I am not really into the sex at all. When she asks me why, I can't give her a straight answer. So she asks me if I might be more into it if I still thought she was my step-sister. That does the trick, I am rock hard and cum super fast. I guess we get to pretend from here on out, because I need my head in the game. Fast forward a few months down the road, we decided to get a DNA test, and it turns out; we ACTUALLY ARE STEP-SIBLINGS. That doesn't stop us though, it's hot as fuck, I love fucking my new step-sister.