"You mustn't move!" their father's voice echoes, but it's a futile command as Michelle and her brother, trapped in their secret space, give in to their pent-up desires. Michelle's untouched pussy drips with lubrication, coating her brother's cock as she slowly sinks down, impaling herself on his virgin length. They rock together, their bodies slick with sweat and shame, until they collapse in post-coital remorse, their taboo lust temporarily sated amidst smeared juices and spent fluids.