In a cramped Brazilian bedroom, an attractive sister and brother, both amateurs in front of the camera, struggle with their forbidden desires. The girl, a busty 'gostosa', can't keep her hands off her 'ladinho' brother, while he tries to resist her charms. Their father's stern voice echoes in their minds, but the siblings can't deny their lust any longer. They start to touch each other, their bodies responding eagerly, as they give in to their taboo urges.