Cramped in a closet, siblings maintain their virtue by not moving, but their bodies betray them. Religious guilt haunts the sister as she pushes her brother's massive cock inside her. They struggle to remain still, their natural lubrication soaking his shaft. As they slowly sink down, rubbing their untouched vaginas along the hard cocks, they're consumed by taboo lust. They collapse into post-coital remorse, praying for absolution from their sinful desires.