The brother, already rock hard from watching his sister's exhibition, can't hold back any longer. He bursts in, his thick, straight cock aching for release. She looks up at him, her eyes filled with lust and surprise, but she doesn't stop. He watches, mesmerized, as she continues to pleasure herself, her massive, dripping panochota beckoning him. Unable to resist, he strokes his cock, his breathing heavy, until he finally can't hold back any longer. He explodes, his hot cum shooting onto her waiting, eager face.