Lost in his depression, a man finds solace in the shadows of his mind, his thoughts turning to the taboo. He envisions his sister, her large ass and big tits pressed against him, her breath ragged as she grinds against him. He imagines her hands on his cock, her mouth around it, her pussy tight around him. But his thoughts are clouded by guilt and shame, his depression twisting his desires into something dark and twisted. He trembles, his body wracked with pleasure and pain, as he falls into another bout of his haunted, self-loathing masturbation.