Convince him

"Do it, Harold," you say, putting an edge on your voice. "Do it or I will. I'll fuck him, and I won't be gentle about it. And when I'm done, I'll kill him."

"You can't!" Harold gasps. "I- I won't let--"

"How are you going to stop me, master?" you ask. "Send me back? And risk me dragging your soul with me into Hell?" You've got him, and he knows it. There's nothing he can do to you.

"Please..." he whispers, helpless and afraid. You press closer, holding his cock as you nudge him forward, closer to the hiker's ass.

"Just do it," you say softly. "You know you want to, and now you don't have to feel guilty about it, because you don't have a choice. Fuck him or he dies."

With a breath that sounds suspiciously like a sob, Harold goes to his hands and knees over the prone man. He lowers himself, letting you guide his cock to the hiker's hole.

The hiker suddenly seems to realize what's happening and begins to struggle again, fighting to free his wrists from the underwear binding his arms behind his back. "What are you doing?" he shouts. "Stop! Stop it! You can't fuck me! Please!"

You can feel Harold shaking, fighting against the chains of morality. You have no such restraints. "Do you want me to do it?" you ask. Harold breaks, making a strangled noise as he sinks his cock into the hiker, drawing a wordless shout from the man's lips.

"That's it, Harold," you say, releasing his cock and cupping his bare ass instead, gripping and kneading the firm muscles, encouraging him to rock his hips, each tentative thrust filling the forest with the sweet whimpers and moans of the hiker. The sight of Harold's ass rising and falling with each stroke, makes your cock ache, precum running down the shaft.