The other day you walked in on me masturbating to some really nasty porn. We decided to make a deal that if I do something for you, you wont tell out parents. So you decide that you want me to get naked and stuff my pussy with the thong I'm wearing. Its so awkward watching how turned on you get since you're basically my step-brother but I do it anyways. Dont want you telling the parents what naughty stuff I was doing. And to be honest it kinda turns me on as well. I figured you would just want to fuck me tho but this is fun too. Maybe next time tho? ;)