TABOO he spies on me while i read then we FUCK

I was reading an interesting book in the living room of my stepparents' house, and my stepbrother was wandering around the room, I saw him a little restless and agitated going from one side to the other, I suspected it, he was spying on me, he was also wearing a nice dress and you know... he didn't have pants and I think that encouraged his lust, I caught him and confronted him to ask him why he was spying on me and I got a big surprise....