Jack couldn't say it was his worst nightmare. In the over 300 years of his existence, the guardian had thought up a thousand different horrors, but none as unique as this.

The shadows restrained him, his bare skin spreading intricate silver filigree across the dark floor of Pitch's underground dungeon. He could hear the fearling above him, snorting and pawing at the ground, waiting for the Nightmare King's instruction.

Jack tired not to look up. He tried not to let Pitch know how much this bothered him, how much it scared him. But Pitch knew. He always knew.

The older man's face curled into a cruel smile as he spotted the younger one's expression of determination.

"You want it, don't you…?" Pitch's voice was thick and smooth and so full of amusement that Jack felt sick to his stomach as the shadows restrained him further, pushing slowly inside as they stretched and prodded. Jack didn't answer him, not because he didn't want to betray himself, but because he wasn't entirely sure if Pitch was talking to him or the fearling that stood at the ready.

"Carry on, then." Pitch sat back against his darkened seat, his pale face shining in the heavy shadows that hung around him. Jack knew he was defeated when he felt something pressing against his exposed ass, threatening to intrude his tight, puckered hole.

The fearling whinnied and shifted and Jack felt a shiver of fierce pain run through his body as the fearling entered him. How could it even fit?

Jack couldn't even begin to wrap his head around it as white spots of pain swam around his eyes and he cried out.

Pitch's laughter rang through the chamber as the fearling pushed further in. What once was just a simple, excruciating pain turned into a searing hot sensation as the fearling's thick cock threatened Jack's prostate.

Jack writhed against the shadows that restrained him, attempting to shy away, but he found the grip tightening and he only succeeded in pushing the cock inward.

He let out a low moan as the horse bumped his prostate, bringing with it a different kind of sensation. Jack bit back a cry, feeling a static tingling come from behind his navel as the fearling began to move, desperate for friction and release.

The Guardian found himself breathless as he himself grew hard and heavy, his cock slapping against his exposed stomach as his balls became heavy with release.

In the shadows, Jack saw Pitch's own hand moving, stroking himself and smiling as he watched the younger man struggling to cope.

Jack felt dirty and buried his face in his arms as the fearling forced itself deeper. He bit back a scream, willing the tears away as his teeth bit down onto the pale flesh of his arm. He wanted the whole thing to be over.

His own release was building as the fearling became restless, not withholding the force of it's passions any longer. Jack felt as though was about to explode. He tried to breath, but it felt like he was drowning all over again, the pain making his own release nearly impossible.

Suddenly, the fearling stopped and Jack felt every muscle in it's body tighten and then suddenly he was filled with the most horrible sensation he'd ever experienced.

Cum poured onto the floor as the fearling pulled out, leaving Jack feeling stretched and empty. He nearly whimpered from the pain, but held back. He couldn't give Pitch the pleasure.

Instead, he poured every ounce of will in his body into expelling the offensive fluid. It backfired and Jack wretched, collapsing on the floor in the puddle of cum.

Pitch stood, laughter ringing off the dark recesses as he descended upon Jack, who lay there on the floor, weak and unable to react as the Nightmare King lifted him roughly with the shadows.

There was another warm intrusion and Jack let out a cry of pain and surprise. From the expression on Pitch's face, the nightmare had only just begun.