Sis got caught watching porn, not expecting her stepbrother. He teased and persuaded her, and things escalated to intense fucking. Unusual step-sibling dynamic added spice.

I was sitting in my room when I noticed my sister on the bed, lost in the world of porn. She was so engrossed that she didn't even realize I had walked in. I couldn't believe it, my sister, who had always been so strict and proper, was indulging in such filth. I knew I had to do something to shake her out of this trance. I walked over to her and asked her what she was doing. She tried to play it off as nothing, but I could tell she was lying. I confronted her about it and she finally admitted to watching porn. I couldn't believe it, my sister was caught in the act of watching porn and I knew I had to do something about it. I decided to teach her a lesson and made her watch me have sex with another girl. It was a wild ride, but it was worth it to see the look on her face when she realized what she had been missing.