The brother who became aroused by his sister's squats during her workout is suddenly toyed with! "It doesn't feel good at all!" he insists, but gradually his legs tremble uncontrollably, leading to incontinence and climax. Despite being completely satisfied, he refuses to admit it to his sister... Suddenly, he thrusts his penis in! Then, losing all reason, his expression suddenly changes! He wildly shakes his hair, reaching a climax with a slap on the back! His strong-willed sister succumbs to incestuous sex...
