In a bet gone awry, a curious brother sets up a webcam, expecting to catch his sister in compromising positions. But as she innocently tries on outfits, he's the one left squirming. His growing bulge betrays his excitement, much to her amusement. She playfully parades around, knowing he's watching, her nipples hardening under her thin top. He strokes his cock discreetly, trying to hide his loss of control. She wins the bet, leaving him humiliated and horny.