In the dark closet, siblings entwine, virtue forgotten. She guides his thick cock to her entrance, their breaths syncing. "You mustn't move," echoes in their minds, but their bodies betray them. She sinks down, her tight cunt enveloping him. They rut, the closet filling with their moans and the scent of sex. Afterwards, they collapse, shame-faced, praying for forgiveness from their taboo lust.