Matt didn't know how they got to this point; they were arguing as per usual over a recent call out- which Mills- was getting caught up in fantasising about joining the squad and was more focused on that than concentrating on what he should have been doing. They argued at the scene, they argued getting into their respective trucks, they argued over the radio on the way back to the firehouse; they argued getting out of the trucks, and they argued all the way through the firehouse.
Everyone gave them a wide berth fearing they were finally going to go nuclear and kill one another.
It had become a norm for them since they fumbled kiss a few weeks ago in the alleyway next to Molly's. They were both a little drunk- bickering- as usual since Andy's death. Somehow, they ended up in the alley with Kelly pushing Matt against the wall, shoving his tongue in his mouth and a rough, calloused hand down the front of his pants. Since then, the tension between the two had skyrocketed.
Which led them to now. In Matt's office, blinds drawn and the door locked.
Matt's back scrapes the wall hard. Kelly has rough and utter possession of his mouth, and when he slides their cocks together just right, it feels so fucking good, even through the multiple layers of clothing, Matt can't stop the soft wanton whine that escapes him to echo through the room.
"If you can't keep quiet, lieutenant, I'll have to gag you," Kelly says. His face is pressed into the soft, smooth skin of Matt's neck, his mouth licking and sucking at his pulse point. Kelly's short hair is in the path of Matt's clawing fingers, and at that proclamation, Matt tightens his blunt nails into Kelly's scalp even further.
Matt's dick jerks, and he feels a dribble of pre-come escape to seep into his trunks. He can't contain the shallow groan that escapes his lips.
Kelly feels that jerk, and he looks Matt square in the face for a moment, a dangerous smile crossing his face. God, it's that smile that makes Matt want to beg. Under normal circumstances, he's just as stubborn as Severide, but he wants to give in right now.
The tension holds for a few seconds, and then Kelly is shoving Matt around to face the wall. He has to brace with both hands to keep from hitting it face first. Kelly gives him absolutely no time to adjust, quickly yanking his trousers open viciously and thrusting his hand inside to rub at Matt's cotton-covered cock. They don't really have time for gentle.
"You're so messy, Matt," Kelly growls in his ear. "Getting your panties all wet for me with how bad you want it." He presses harder against Matt, rubbing his sticky, wet cock through his underwear until it chafes roughly; it hurts a little but in an oh so good way. Matt moans again. Damn it; he hates that Kelly can make him come so undone.
"Fuck it," Kelly warns, squeezing punishingly hard and then releasing the painful pressure. "I told you to keep quiet, lieutenant. Can't have the men finding us like this."
His free hand leaves its grip on Matt's hip and reaches over to grab Matt's beanie off his desk.
"Open up," Kelly commands and makes him do just that, squeezing the hinges of Matt's jaw until his mouth opens involuntarily.
Kelly stuffs the woollen beanie into his mouth, deep and rough and oh shit, Matt's not sure his knees can keep him upright through this. He tries a groan, and it comes out muffled around his mouthful of fabric.
"That's it, Matt," Kelly whispers. "Now you can make all the noise you want, and no one will come knocking." He shoves Matt's trousers down and takes his briefs with them, exposing his lovely pale arse.
Matt hears the sound of the slap an instant before he feels the sting of Kelly's hand landing hard and fingertips gripping his right cheek. He grunts into his beanie, briefly closing his eyes to focus on the sensations and feelings coursing through his body.
"This is one gorgeous fucking ass. The things I want to do to it," Kelly says. The low husky register of his voice is pure sex, and Matt can't help up push back against Kelly's rough hand, wanting Kelly up inside him, filthy and naked, no lube, no condom. He wanted like nothing else to have Kelly take him, quick and dirty, right in his office.
God, Kelly makes him so depraved. Unhinged with desire- it's so wrong but so right.
Kelly's taken his hands off Matt to undo his own trousers and, in just a few seconds, returning to rub up against Matt's slightly sweat-slicked skin- slipping his dick into the crack of Matt's ass and slipping a hand around to pull and squeeze his balls gently.
Matt continues to whimper around the beanie in his mouth, thrusting back and forth, seeking sensation wherever he can get it as Kelly takes total command over him. Kelly enjoys this, having Matt at his mercy, under his hands- his body to do as he pleases. It's an adrenalin rush he hasn't ever felt with a woman.
"Yeah, Matty, get yourself off on me," Kelly says, nipping at Matt's earlobe before giving it a rough tug. He spits noisily into one hand and works the saliva between Matt's cheeks to ease the slide of his cock. Matt presses back into him over and over as Kelly finds a rhythm, shoving and grunting and, fuck finally, wrapping his hand around Matt's weeping cock; he could almost sob in relief from the friction. The feel of Kelly's thumb collecting his precum and spreading it over his shaft on the downstroke was nearly enough to make him delirious.
Kelly is panting in his ear and thrusting fast against him, and Matt feels free and debauched, and it's all so fucking good he wants to scream. He tries to, and the way the beanie in his mouth deadens the sound only makes him more crazed for it.
"Has anyone played with this gorgeous ass, Matt?" Matt shakes his head, his heart rate picking up more than he thought possible.
"The thought of my fingers inside you, stroking you, feeling you….I can't stop thinking about it." Kelly's voice is rough and thick with lust.
Kelly's thrusting goes erratic, and he chokes out a feels so good and comes all over Matt's ass and lower back. It's what sets Matt over the edge- Kelly marking him all sticky and warm- with a muffled wail and a whole-body shudder. His arms collapse, and he falls against the wall, Kelly falling right behind, pressing him there, holding him up while they both pant desperately for breath.
Kelly recovers first and reaches around to gently pull the spit a sweat-covered beanie from Matt's mouth, massaging his stiff jaw a little with his other hand. Then pressing a soft kiss to the back of Matt's exposed neck.
"You, okay?" Kelly asks, with much more care than Matt would have thought.
"Fuck I needed that." His voice was quivering from the assault on his body from the orgasm.
"Yeah, you're an uptight fucker." Matt gives him a small kick to the ankles with his foot. He's too relaxed and blissed out to do anything else.
"I'll never be able to wear my beanie without remembering this."
"I'll never be able to look at that beanie while you're wearing it and not remember this." Kelly shuffled away, trying to find something to clean the back of Matt up. "Do you have tissues in here?"
"Yeah, bottom draw in the desk." Matt turned his head, his pink tongue flicking out the wet his parched, cracked lips. He swallowed loud enough for Kelly to look up from cleaning up his spunk. "Are we going to admit this tension between us?"
"You mean irritation and frustration?"
"Kel, can you be serious for a minute?" Matt aggressively rubs his palms over his face before reaching down and picking up his pants.
Kelly was quiet; he wasn't sure how to answer the question. Did he want something with, Matt? Did he want to try? He couldn't deny that there was something- never in a million years did he think that they would be off at random times stealing kisses and grinding against each other in their offices when they have a spare minute. But that didn't mean this was relationship material, just a fucked up set of circumstances- rather than punching each others lights out, they were leading up to fucking each other senseless. He replayed this moment in his mind, and he really didn't want to do this with any else- couldn't now imagine this with anyone else.
"Yeah", was all he said. He didn't know the words, and looking up into those beautiful blue eyes, letting the emotion show, he knew Matt would understand.
A pure smile that shone with genuine happiness- the first one he had seen on Matt's face in weeks- was all he needed to know that he had done the right thing. That they were going to be okay.