Sister's boyfriend found pleasuring himself while fantasizing about her - MySistersSis

As I strolled into my sister's room, I caught her beau in a rather compromising position. He was indulging in self-pleasure, his mind filled with images of my sister. His lustful fantasies were so vivid, they were almost tangible. I couldn't resist the urge to join in on the fun. I quickly shed my clothes, offering myself to him as an extension of my sister. He eagerly accepted, his member throbbing with anticipation. I skillfully took him in my mouth, setting the stage for what was to come. I then mounted him, riding him hard and deep. The ecstasy was palpable, our bodies entwined in a passionate dance. We switched positions, him taking control as he penetrated me from behind. The intensity of our encounter left us both breathless, a testament to the raw, animalistic desire that had consumed us.