Bored and alone, a brother and sister turn to masturbation to pass the time, their chat growing increasingly suggestive. The sibling's exchange starts innocently enough, but soon veers into the taboo as they share their fantasies and describe their bodies in explicit detail. The sister, her pussy throbbing, can't help but imagine her brother's cock inside her, while he, rock hard, pictures her tight cunt wrapping around his shaft. Their chat grows heated, their breaths ragged, as they edge closer to the precipice of confession and perhaps, action.