My stepsister reveals herself and has sex with me using her dress until I climax before leaving for a party

I was hanging out with my stepsister, trying to chill and have a good time. Things took a wild turn when she revealed her sexy curves beneath her dress, making my heart race. I couldn't resist the temptation to touch her, and soon we were entwined in a passionate embrace. The intensity of our connection was undeniable, and we continued to explore each other's bodies until I reached the peak of pleasure. As I climaxed, she teasingly whispered "not brother" before quickly leaving for a party, leaving me alone to clean up the evidence of our intense encounter. This unexpected rendezvous was a thrilling experience, and I couldn't help but wonder what other secrets my stepsister might be hiding.