I’m your little sister, and I want to make sure you have the best birthday ever! Me, mom and dad all agree that you deserve a very special present. We’ve been keeping it a secret but now it’s time to tell you. Your birthday present is … me! You get to take my virginity, big brother! And not just that, but you can use my body whenever you want from now on! I timidly undress for you, embarrassed and shy. Then I get you warmed up by sucking your dick. I’ve never done it before … will you show me how? Finally I get on top of you and let you be the first cock to ever go inside me. I ride you until you cum inside me. Was this the best birthday ever, big brother?