I'm your step-sister and I catch you wanking into a pair of my knickers. At first I'm shocked and angry but then I begin to find it funny. I call you a dirty pervert and laugh at how embarrassed you are ;)

I ask if you have a knicker fetish and if you often go into my room to sniff them. I demand that you give them back to me and then notice you trying to cover yourself up. "What are you trying to hide?" I ask. "Come on big step-brother show me your dick, I want to see it. You pull your hand away and I laugh when I see your tiny penis. "Is that what you were wanking? Hardly worth t... Show more