I walk in my bedroom and I not only are you in my room...but you're JERKING OFF...with my dirty panties!! I can't believe that you're such a perv, what kind of brother even does that?! I'm going to tell mom, but then I tell you I won't tell her if you let me watch you finish, and if you'll let me tell you what to do. You quickly oblige, your cock growing harder and harder as I tease you with my perfect thick body. I tell you how to stroke your dick, and like the good sister I am, I even show you how. After stroking your cock and feeling how big it is, I can't help but be turned on. I tease you with my huge ass before I play with my tight little pussy for you. This isn't what siblings should do, but it feels so fucking good. I can't take it anymore and I get on top of you, taking your hard brother cock into my wet pink pussy while I dirty talk. I turn around and give you a nice view of your sister's massive tits while I bounce on your dick, in awe of how good it feels to fuck my brother. I decide that I want to see how much you cum, so I stroke your cock until you bust...and you SOAK me with your massive load of hot jizz. I take off my panties and give them to you as a gift...Now you can stroke your cock with THESE panties while you think about the time you got to fuck your sister. Maybe we'll have to do it again soon? Either way, this is our dirty little sibling secret.