My sister walked in on me when I was masturbating and ever since she spotted my huge dick she probably wanted to get a taste of it. When she came to apologize she confessed has seen me jerk off before and always had this fantasy to boink someone with a cock as huge as mine... well you know where I'm getting at. Lengthy story short, I plumbed that cockslut and really spread her tight vagina with my heavy jizm cannon. You're welcome, stepsis! Shagging slut!