You prevent it.

You feel his pace increasing, his movements getting shakier and out of rhythm, you know it's only a matter of time. You feel your ass clench around him, as if your body is asking to be filled with his cum. The thought of being creampied by an overloaded ponyboy makes you shudder, you choose to believe it's from fear rather than excitement. You do your best to control yourself, override your instincts to continue getting railed to completion. Just as you feel his cock pulling back you bolt forward, not giving him a chance to ram it back in. You gasp as you feel it slide completely out of you. Your position and outfit make it nearly impossible to maintain your balance, so you collapse to the ground. You can't fully notice what's going on around you, but you hear some very agitated grunts from behind you.

"You fucking tease!" You hear Sam shout as he rushes over. You brace yourself expecting him to grab you, but he doesn't. Confused, you manage to roll yourself over, your arms now, uncomfortably pinned between your back and the ground as you can clearly see Sam with the Ponyboy's cock in his hand. He strokes it rapidly while seemingly doing his best to keep it in place, pointed directly at you. Before you can make any other move, you watch the head of the cock begin to expand. You experience it as if in slow motion, white cream begins to bubble out from the tip, shooting out in a long, endless stream before hitting you directly in the face. Sam's hand continues pumping as he keeps the cock directed, slowly moving it down, coating more of your body in cum. You can't believe how much is coming out of him, making you glad you didn't let him put it inside of you, however you are now laying on the ground practically painted in white.

"Woah! that a boy!" Sam says as the Ponyboy's balls seem to finally be empty. Sam removes his grasp from his cock allowing the Ponyboy to also collapse on the ground.

Through cum covered eyes, you can make out Sam's figure standing above you.

"That wasn't very nice of you." He says, his voice sounding playful yet stern. He bends down, grabbing onto a piece of material just under your hood. With one quick yank, he pulls you up. Cum drips down to your feet as you finally manage to get back to a standing position. "Turn around!" He says, this time more stern, less playful. You're not sure what pushes you to listen, but you quickly turn around, your back towards him. You soon feel something heavy grip on to your back. You turn your head enough to see that you are now attached to the chariot that was previously being pulled by the Ponyboy.

"The reason we don't let the horses cum is because they become useless after." He says, pointing at the Ponyboy now seemingly asleep on the ground. You feel the weight on your back increase as Sam gets into the chariot. "But we clearly have to get you cleaned up, so it's a good thing we have another useable Pony." He shakes the reins, smacking you on the back, you instinctively begin to walk forward, it is now easier to stay balanced, but you have to use all of your strength to pull the weight behind you. "Faster!" Sam shouts shaking the reins again. You let out a grunt as you reluctantly follow his orders