Author's Note: I wrote this when I was horny and craving some bottom!Derek sterek smutty goodness. I regret nothing about this one shot. Review and I'll write more!

Stiles walked into his office to see Derek slightly bent over the desk shuffling through some papers. It wasn't deliberately sexual, more like he was just too lazy to go around the desk, but Stiles didn't mind the view it created. Derek hadn't reacted to Stiles coming in, as his back was turned, so Stiles quietly shut the door and blinds. Derek sensed Stiles' presence from miles away, but chose to play dumb in order to empower Stiles' hunger.

He approached Derek and firmly grasped his muscular glutes, evoking a deep, sensual growl from his lover. That growl always drove Stiles over the edge and sent him into an animalistically, sexually charged state.

With his primal instincts taking over, Stiles ordered Derek to take lower his pants and underwear, as he quickly followed suit. Derek knew full well he could easily dominate Stiles, but something in Stiles allowed his alpha heart to surrender to his every wish and command.

"Spread them," ordered Stiles. Derek quickly acquiesced, exposing his hairy, pink hole to Stiles' gifted tongue. Derek moaned as Stiles' warm licks incited ripples of pure ecstasy to pulse through his body.

"Do you like that, you little slut?" Stiles asked sultrily between tongue strokes around Derek's delicious hole.

Derek could only moan in response. Stiles lubed up a few fingers and began to slowly breach Derek's pleasure zone.

"Yeah…open up that hole for daddy," Stiles whispered, his breath hot against Derek's ears.

Stiles lubed his rock hard cock and rubbed the tip of his cock against Derek's entrance.

"Mmmm," escaped from Derek's lips involuntarily. Stiles grinned in amusement.

"Do you want this big cock inside you?" asked Stiles teasingly, yet sternly.

"Yes," answered Derek, barely a whisper.

"Beg for it," Stiles demanded as he ever so gently inserted the tip inside Derek.

"Please…Stiles…please fuck me," Derek pleaded desperately, his hole beginning to contract and expand in urgent hunger and thirst.

Stiles finally granted Derek his wish, his cock gently sliding inside Derek, as Derek's hole swallowed his girth and length to completion. Stiles continued penetrating Derek's hole, as both men moaned in pleasure. Stiles began to speed up as Derek's hole relaxed, his thrusts gliding smoothly inside his alpha lover.

A heatwave courses through their veins, as their pumps of ecstasy beget beads of sweats on their glistening skin, and as their moans are alternated by heavy breathing. Stiles finds Derek's pleasure button, and continues to push it, driving his counterpart wild. A few more presses and Derek's cock wildly explodes all over Stiles' desk.

Stiles senses his own explosion on the horizon. He pulls out of Derek's heavenly wonderland, and firmly spanks Derek's ass. This was Derek's sign to turn around, kneel, and prepare to receive his daily dose of Stiles' warm, panacean nectar.

Stiles gave out a big groan as his cock began to twitch inside his lover's mouth. A few twitches and streams later, Derek's mouth was full of Stiles' cum. Derek savored Stiles' taste for a few seconds before swallowing his huge load, and ensuring to lick Stiles' cock clean of any remaining natural protein.

Derek rises and they kiss. They lay against each other for a minute as they catch their breath and slowly descend from their cloud nine.

As they slowly get dressed, they glance over at Scott. As always, Scott was in the room, watching Stiles and Derek as they passionately made love, and pleasuring himself the entire time.

"That was so fucking hot, guys," Scott says, his breath heavy post-orgasm.

Stiles smirked and looked at Derek. Derek gave Stiles a knowing nod.

"See you at home tonight?" Stiles asked Scott.

"Fuck yeah."