Unbeknownst to her, the brother's panty fetish is awakened by his sister's careless wardrobe choices. She's just trying to enjoy a day around the house in her favorite lingerie and skirt, but his eyes are glued to the tantalizing sight of her panties peeking from beneath her hem. He watches, hidden, as she bends, stretches, and moves, his cock hardening at each brief flash of her lacy underwear. The thrill of the taboo, the danger of discovery, only adds to his arousal, as he struggles to maintain control.