High-quality ultra-realistic 4K video with smooth fluid continuous motion and seamless high-frame-rate animation, 25-year-old stunning blonde woman with long wavy blonde hair, petite slender athletic frame, narrow waist, large round firm ass, oiled glistening skin, perfect detailed anatomy, aroused expression, riding a muscular man's thick erect cock in reverse cowgirl position facing away from him with ass toward camera, rapid intense yet rhythmic bouncing up and down with strong controlled hip movement, natural physics on ass cheeks jiggling and rippling realistically with each smooth thrust, deep penetration visible, sweat and oil sheen reflecting light, coherent looping without choppiness, close-up on ass and penetration with subtle full-body pans, high detail on genitals, skin texture, and motion physics, passionate hardcore sex, cinematic lighting, perfectly seamless looping clip