The confessional booth, usually a place of penance, became an altar of sin as the siblings, cloaked in darkness, let their inhibitions fall away. Their hands, at first hesitant, soon explored each other's bodies with a feverish desperation. His fingers traced the curve of her breast, his thumb brushing against her nipple, eliciting a gasp. Her hand, trembling, reached for his growing erection, feeling the heat and hardness through his pants. The creaking of the wooden bench and the distant echo of a hymn sang a haunting melody as their bodies betrayed their sacred vows, succumbing to a carnal dance that would leave them breathless and forever entwined.