I discovered my stepsister having sex with her boyfriend on the internet and warned her to engage in sexual activity with him or else I would inform our mother.

I stumbled upon a shocking sight as I was browsing the web, witnessing my stepsister getting intimate with her boyfriend. Initially, I was taken aback, but then I decided to give her an ultimatum. I told her that if she didn't start engaging in sexual activities with him, I would reveal our secret to our mother. She hesitated at first, but eventually agreed. I could see the anxiety in her eyes, but also a hint of excitement. I took a step back, watching as she slowly undressed, revealing her beautiful curves. Her boyfriend couldn't hold back any longer, and he eagerly took her in. I could see every detail, every movement, every moan. The way he filled her up, the way she welcomed him, it was a sight to behold. And when he finally reached his climax, he did so inside her, leaving a perfect creampie. It was a moment of pure, unadulterated passion, and I was glad I had caught them.