Black Dog

The first time it happens, Dean's not expecting it.

He stumbles a little, leans against a tree and clenches his ass, riding the pressure deep inside him as he thrusts his hips a little and comes in helpless spurts through his underwear. He can feel the rough bark of the trunk biting into his fingers, and spots flare behind his eyes as he bites down on his lip and tries not to moan too loudly. It wouldn't do to alert the black dog they're trailing. He grimaces at the sticky wet mess in his pants, and reaches down to adjust his overstimulated cock so it doesn't rub so much.

"Dude, you okay?" Sam hisses. Dean directs a death glare at him, and Sam chuckles softly.

"Can't I..." Dean begins.

"No," Sam says quietly, firmly, and that's it.

They continue on, as quickly and quietly as possible, and Dean tries not to moan when the plug inside him rubs mercilessly against his prostate. His dick swells, expands, fills his briefs and when Sam spots the spirit off in the distance, they start running. Dean's eyes tear up and without even thinking about it he reaches down to squeeze his cock while they run. He comes mid-stride and almost hits the ground, Sam's hand wrapping around his arm the only thing stopping him getting a faceful of dirt. Dean can feel the damp stain of his come seeping through his clothes, and when he brings his hand away from his crotch his fingers are slightly sticky.

They're almost there, and they duck behind a tree as Dean absently licks his fingers clean. Sam makes a muffled sound, and Dean cocks an eyebrow at him.

"You want me to..."

"No."

Dean rolls his eyes. Control freak.

They can see the spirit of the dog nosing around in the leaves at the base of a tree not far away, and just as they're about to leap out and rocksalt the thing it flickers and vanishes.

"Fuck!" Sam curses.

Dean doesn't answer him, he just squirms and clenches his ass, wondering if he's gonna get another orgasm out of this thing. He kinda hopes so. The way Sam's looking at him means he'll be putty in Dean's hand when they get back to the motel.

They head back to the car, a little more slowly, and Dean finds himself getting used to having a buttplug inside him. The come cooling in his pants is kinda gross, though, and he's looking forward to cleaning himself up.

Sam tackles him to the ground and the dog leaps over their prostrate forms. Dean groans loudly as the plug presses against him again and his stupid overexitable cock is once again hard in his pants, enjoying the slippery and slightly rough sensation of his underwear rubbing over the head.

And they're off again, chasing the damned thing, weaving through the trees and trying not to fall on their asses and Dean's trying desperately not to come again because it would pretty much be the worst timing.

"Dean! Over there!" Sam yells, and Dean whirls around to see the dog not ten feet away from him.

"Hang on!" he yelps, bending over and coming again, God, so fucking good, his abused cock jerking fitfully in his underwear. Then he straightens up and shoots the dog right between the eyes. The spirit dissipates with a ghostly whine, and Dean collapses onto his knees.

"You okay?" Sam's at his side in a moment, a hand stroking across his back.

"Get this thing outta me," Dean forces out through clenched teeth. "I'm fucking dying here."

Sam nods. "Okay," he whispers, and Dean exhales in relief as Sam's hands unbuckle his belt and slide his ruined jeans and underwear down over his hips. The fabric catches against the base of the plug as it passes over his ass, and Dean yelps as it presses against his prostate again. Cool fingers slide over his ass and ease the plug out of him, and Dean groans happily. Sam's hands roll him over so he's lying on his back, his pants around his knees and stones jabbing into the backs of his thighs and ass.

"God, Dean," Sam says, his breath hitching. "You're... you're so filthy."

"What are you gonna do about it?" Dean replies, grinning when Sam leans down to lick him clean.

Fucking awesome hunt.

END.

~~~

This picture is a good representation of how Dean looked the second time he came. ;D

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