Back with another chapter for you guys. I hope you're ready for this one.

Real quick, I want to thank you all so much for 100+ reviews on this story. That's crazy to me, I'm so glad you all are enjoying this. Thank you so much for the constant love and support you guys have given me, I appreciate it so much. It really helps keep me motivated and I love getting these chapters out to you guys. Thank you all so much.

Also, fair warning, this chapter is Rated M. Like very much so. To those of you who were asking for more of that, this one's definitely for you. Enjoy.

EIGHT

Gabby walked up the sidewalk towards Casey's front door, a slight smirk resting on her face as the door opened, Matt stepping out before she could even get to the steps.

"A bit eager, aren't we?" She teased, climbing the stairs and coming to a stop beside him, Matt raising his eyebrows challengingly.

"I just got home, saw you from the window." He explained, Gabby nodding before walking inside, Casey following after her quickly. Matt shut the door, turning around to find Gabby nowhere in sight, his eyebrows furrowing as he walked through the apartment, catching a glimpse of her turning the corner into his bedroom.

Releasing a soft chuckle, Matt walked the same path she had just taken, quickly getting to his destination as he found her standing in the middle of his room, her eyes on the doorway.

"Seems like someone else is a bit eager, too." He spoke quietly, Gabby scoffing lightly as Matt walked towards her, his eyes raking up and down her body while she discarded her jacket, tossing it onto the chair in the corner.

"You're sure about this?" He questioned softly after a few quiet seconds, Gabby's brown eyes piercing into his. With a slow nod, she stepped forward, placing her lips on his, their movements starting slow before they quickly picked up pace, Matt blindly pushing them back towards his bed. But before he could sit her down, she flipped their positions, her action taking him by surprise as she pushed him down onto the mattress. He looked up at her, seeing a proud grin covering her features as Matt pushed himself up towards the headboard, Gabby peeling her shirt from her body before climbing onto the bed. In seconds, she was on top of him, capturing his lips with hers again while her legs straddled his hips. Matt's hands flew to her waist, his grip tight as they fought against one another, his fingers digging into her skin.

Gabby trailed her kisses from his lips across his jaw, moving down to his neck, surely leaving her marks as she assaulted his skin. Matt released a low moan while his hands moved to the front of her jeans, fiddling with the button and zipper, soon getting them both undone, trying his best to push them down her hips while she continued kissing and biting his neck.

With her help, her pants were discarded, Gabby kicking them to the floor before resuming her position on top of him, her hands moving to his shirt, desperate to remove the material. Matt raised himself up, letting Gabby pull the shirt off his body, tossing it aside aimlessly as her hands roamed over his bare chest, Dawson attaching her lips to his again while his hands clung to any part of her body he could grab.

Her kisses soon moved down to his chest, Gabby grazing her teeth over him as she took the time to appreciate his exposed skin, enjoying the involuntarily groans she pulled from him as she worked. Slowly she continued leaving her marks down his body, feeling his breaths get deeper as she got closer to his waist, Gabby's quick hands undoing his jeans, Matt raising his hips so she could pull them off.

Resting her hands on his upper thighs, she gripped his legs tightly, leaning back down to resume kissing his skin, not wanting to waste the opportunity to appreciate all he had to offer. As her fingers gently squeezed his thighs, she focused her attention on the patch of skin on his hip just above his boxers, sucking on the area harshly.

Matt's hand came to grip the top of hers, silently willing her to continue as he felt her grin against his skin, darting her tongue out to soothe the area she'd just lightly bitten down on, her hands sliding up his thighs to the waistband of his boxers, teasing the elastic, enjoying the impatient and needy groans escaping through his lips.

"Gabby…" He breathed out as she looked back up at him for the first time, seeing his gaze focused on her, his eyes dark with want.

Knowing she'd teased him enough, she pulled the material down his legs before she threw the clothing to the side, leaving him completely bare as she made herself comfortable. She was eyeline with his waist, Matt unable to look away from her while he waited for her next move, Gabby's eyebrow raising as he took him in her hand, slowly stroking up and down as his head fell back against the pillows.

When he was good and ready, she spared one last glance at him, seeing his eyes closed and his head facing the ceiling, before taking him into her mouth. Her actions caused his eyes to fly open, Matt lifting his head to look down at her, desire flooding his body as he saw her looking up at him through her lashes, her motions starting out slow and deliberate.

He placed his hand on top of her head, helping her movements as she picked up her pace, Matt's head collapsing back against the pillow as he brushed the back of her throat. It took every ounce of willpower in him to not lift his hips off the bed, Matt focusing on the feel of her mouth taking hold of him.

Her free hand was scratching over his stomach while her other aided her movements, Matt's body feeling as if it were on fire as she continually took him in as far as she could. She changed up her speed every few moments, leaving him on edge, both of them knowing she had complete control over the situation.

Her movements began slowing down, Gabby closing her mouth around him as tight as she possibly could, a low moan leaving his lips as he gripped her hair. She spared a glance at him while she ran her tongue over him, his body involuntary trembling when she released him from her mouth, Gabby wearing a proud look on her face.

As much as he wanted to know exactly what it feels like for her to finish what she started, he appreciated her stopping when she did, not wanting things to end prematurely.

Gabby placed a soft kiss against his hard skin, sliding her way back up his body, grinding herself down onto him as their hips connected, Matt groaning before she kissed him again. His need for her was pressing against her thigh, his hands sliding over her back, desperately searching for the clasp to remove the article of clothing separating their skin.

Within seconds, he slid the bra down her arms, getting it out of his way before running his hands over the newly exposed flesh, Gabby moaning into his mouth as he cupped her chest, her hips pressing down harder against him.

Matt took her moment of weakness to flip them over, swallowing the sound of surprise that escaped her lips, his movements getting rougher as he slid a hand down her body, his fingers teasing her over the thin lace material covering her body.

Her moans got louder as he increased the pressure of his hand, Matt encouraged by her noises as he kissed down her neck. He left marks of his own across her skin, stopping to pay special attention to her breasts, Gabby's hips bucking as his teeth grazed over her nipple, his touch eliciting the reactions he was looking for.

Without warning, his hands were off of her, Matt releasing the grip his mouth had on her skin when he pulled back, Gabby breathing heavily as she opened her eyes, finding him positioning himself further down the bed, practically ripping the underwear off her body before settling between her thighs. He placed open mouthed kisses along her skin, Gabby's hands moving to grip his hair as he teased her.

Suddenly everything was happening at once, her grip on him tightening as his mouth went to work, attaching to her center, his actions being helped by his fingers as he focused on her body, the sensation overwhelming her as her mind went blank.

Matt adjusted his angle, feeling Gabby's hand grip his hair painfully tight, the loud moans filling the room telling him just how much she appreciated his effort, her body clenching around him.

After a few impressive moments, he was helping her through her finish, Matt never halting his movements while she trembled beneath him, slowly easing her back down from her high as he lazily nipped at her skin, eventually pulling back completely once her grip on him loosened. He watched her chest heave up and down as she rested her hands over her stomach, trying to catch her breath while Matt kissed his way back up her body, placing sloppy kisses over her skin, stopping to leave another mark on her chest before finding his way back to her lips. He kissed her heatedly, Gabby needing a second to recover before she began kissing him back, Matt covering her body with his, unable to wait any longer.

She felt him slowly enter her, her body tensing as he moved in and out. Her legs hooked around his thighs as he worked them towards a quicker pace, her nails digging into his back while he gradually picked up his speed.

As it had been the first two times, their movements soon became rough and needy, Matt's head falling to rest beside her as he thrust into her at a blinding pace, Gabby trying to keep some semblance of control as he moved.

They'd fallen into that familiar rhythm together, their pants and moans being heard through his apartment. This had become their normal together, every moment frantic and unrestrained, Matt not holding back as he gave her everything she wanted.

Gabby sat on the edge of his bed, her body euphorically achy as she clasped her bra in place. Glancing at the clock, she saw it nearing one in the morning, a sly grin falling on her face as she thought about their night. She hadn't intended to stay this long, but after they finished their first round, it didn't take long for them to start again, Gabby giving him quite the show as she took control. Then after a quick moment to rehydrate and find something to eat, they soon fell back into bed for a third time, the last being the roughest of them all.

"You know," Casey spoke up from behind her, clearing his throat. She turned to look at him, finding him in the same position from when she climbed off of him minutes before, Matt barely covered as he watched her. "You don't have to leave, if you don't want."

A small smile fell to her face, Gabby sliding on her underwear as she stood up, beginning the search for her other clothes.

"I'm alright, I need to get back before my brother calls out a search party." She replied, pulling her jeans up her legs.

"Okay." He responded, his eyes bouncing around the room as he tapped his fingers against his stomach, Gabby watching him closely, his expression unreadable. But she could tell something was bothering him.

"What?" She questioned, Matt locking his eyes on her half naked body, a soft sigh escaping his lips.

"It's nothing, I just… I don't know, I feel kind of weird about this. I don't want you feeling used, or taken advantage of or something, since you always leave right after." He breathed out, her eyebrows furrowing.

"Well, I mean, technically we are kind of using each other." She joked, Matt clicking his tongue against the roof of his mouth before nodding, Gabby sensing that wasn't all he was worried about. "What is it, Casey?" She asked, sliding her shirt over her head.

He watched closely for a moment, trying to figure out how to best voice what was going on in his head, but he couldn't form the right words. So instead, he blurted out the first thing that came to his mind. "What are we doing, Gabby?" He asked quickly, confusion settling across her face.

"We're having fun."

"I know, but we can't keep doing… this." His finger pointed back and forth between them as he spoke, emphasizing his point as Gabby took a step closer to the bed. "These random hookups, whatever they are, it's not going to end well. We shouldn't be doing this."

"Who says we can't?" She questioned, Matt's eyes narrowing in confusion as her words registered, lifting his body up to rest on his elbows.

"What?"

"Who says we can't keep doing this." She spoke again, her words not clearing up anything.

"I thought you said you don't want to date?"

A light chuckle escaped her lips, Gabby sitting back down on the edge of the bed, facing him as she responded. "I don't."

"I don't think I understand." He responded honestly.

"I'm saying, why don't we keep having fun. Nothing serious, nothing complicated. Just fun."

"So, we'd use each other for sex." He clarified, Gabby shrugging as she scrunched her nose.

"I guess, yeah. But instead of us having to go through trying to find different hook-ups all the time, we could just help each other out. Make it easier." She spoke nonchalantly, Matt not entirely sure he was comprehending what she was saying. "There'd be no relationship, nothing complicated, it's just fun. No feelings, nothing messy. Only sex."

"You're serious?"

"Mhmm."

"And you'd really be okay with that?"

"Why not? We have a good time, and turns out you're not half bad." She joked, trying to ease some of the tension from his body. But she could still sense his hesitation. "Look, if you don't want to, okay. I know our situation can be a little… hard to navigate. But it's on the table, if you want."

Matt nodded, reaching for his glass of water on the nightstand, taking a few big gulps before he could respond, his mouth feeling incredibly dry.

"So… it's just sex. That's it."

She nodded, pushing herself up from the bed. "Just sex." She agreed, grabbing her jacket off the chair, sliding in onto her body. "Is that okay with you?"

Unable to form a coherent thought, he merely nodded, swallowing the lump in his throat as she smiled softly at him.

"Well then, it's settled." She replied, moving towards the door. "I'll see you on shift, Casey. Thanks for tonight."

And just like that, she was gone.

He watched her leave the room, his body collapsing back onto the bed as he listened to her go through the front door. As he lay there alone, he couldn't shake the weird feeling in the pit of his stomach, unable to work through how he felt about Gabby's offer. His apartment was dangerously quiet, leaving Matt alone with his thoughts as he tried to figure out what just happened, and what the hell he just agreed to.

Casey walked up the slick driveway of 51, his bag thrown over his shoulder as he hurried to escape the brutal cold. He was a little late this morning, the Lieutenant having slept through his alarm, having to get ready quickly to make it here even close to on-time. He knew a lecture of some sort would be waiting for him, that Boden wouldn't appreciate him being over ten minutes late without some warning, but as he approached the garage and saw Chief's vehicle nowhere in sight, he knew he was in the clear.

Taking a deep breath, he continued on through the garage, nodding to the squad guys brave enough to be sitting out in the garage in the well-below freezing temperatures before he slid in through the first set of double doors.

"Hey Casey." Shay greeted, Matt looking up to see her and Dawson coming from the bunk room.

"Hey Shay. Dawson." He greeted, not missing the smirk resting on Gabby's face.

"Morning Lieutenant." She spoke softly, her eyes moving down his body before coming back towards his face, Gabby flashing him a devilish grin as her and Shay turned the corner, heading for the common room.

He felt he throat go dry, Matt shaking his head as he stopped to watch them, Gabby discreetly turning back to look at him while her and Shay kept walking. Dawson bit down on her bottom lip, winking at him before she turned back around, Casey unable to stop his eyes from trailing over her retreating form.

Matt had no idea what to expect from Gabby, or how they were supposed to act around one another now, and that interaction did nothing to clear things up.

He knew they needed to talk, and soon. If they were really going to do this, be friends with benefits, or whatever terminology Gabby wanted to use, there needed to be no gray area. They had to be on the same page, and Casey wasn't sure they were.

Since she left his apartment the other night, he hadn't been able to stop thinking about what they agreed to, how they were essentially becoming each other's go-to fuck buddy. And he had questions. Lots of them. So many it was kind of overwhelming and he didn't even know where to start.

Are we keeping this a secret? How do we act around one another? Are we telling Shay? Is this a permanent thing? Are we allowed to sleep with other people?

Those questions and many more like it had been floating around in his head for the better part of the past day and a half, and he knew they needed to sit down and actually work out the details. This wasn't as simple as using each other for sex. There were so many other factors to this, that he was still convinced it wasn't a good idea. But he didn't know if that mattered enough for him to put a stop to it.

All he did know was that they had to be on the same page. They couldn't afford to not be, he definitely couldn't afford it.

Despite his reservations about engaging in this type of relationship with her, he wanted to do it. God, did he want to see what else she had to offer. If their first few times together were any indication, she was a lot more wild than he would've ever thought. This could be beneficial for both of them, but they had to come to an understanding about exactly what they were.

Because deep down, he knew this wasn't the greatest arrangement, he knew it could get messy, that it could get complicated. Aside from some great sex, there probably weren't many more pros that could come from this. But there were definitely some cons.

Them working together, for one. Yes, he knew it made for some convenient and quick fun, but what would happen if this ended terribly? No matter what she said, there's never no feelings involved when it comes to sex. Especially not when sleeping with the same person over and over again. It's not like he thinks she's gonna fall in love with him, but there's plenty of other ways this could end badly. One, or both of them, could get hurt. They had to be mindful of that.

And another thing altogether was the firehouse. What would happen if they found out? If Walker found out? There would surely be some questions about when their… relationship began, and Matt didn't want Gabby to have to go through that. Unlike Walker, there was no cheating involved. They hadn't done anything wrong, except maybe to each other, but Casey was sure Bryan wouldn't see it that way. That all he'd see was his Lieutenant had been sleeping with his ex, and there were bound to be problems once people found out. All for some meaningless sex.

Their personal lives were nobodies business but their own, Matt knew that. But he didn't want it to feel like they were deceiving everyone, like they'd been hiding something from them. But he also knew this could throw a wrench in the dynamic of the firehouse, if anyone found out. The last thing he wanted was to cause more problems for Dawson, and the last thing he needed was to cause problems for himself.

He couldn't get transferred again, his career wouldn't survive it. Matt was sure the department probably wouldn't even be able to find a place to send him this time, it was made quite clear to him that he was nearing the end of his rope with headquarters, and while 51 might've not been his last shot, it was close. And even if they could find somewhere to send him, it wouldn't be like this place. The friends he'd made here, the family he'd found, he knew nothing else could compare to that. He didn't want to jeopardize his place here. Though his and Gabby's agreement wasn't grounds for him to be moved, he knew the fallout could be. If this caused his men not to trust him, or God forbid Walker not be able to handle it and something happens there, Casey wasn't so sure he wouldn't get transferred again.

He knew that was the worst-case scenario, that most likely no one, aside from Walker, would even care, that Shay would probably gloat about how she'd been right all along. And that if Walker actually was stupid enough to confront him, if anything did happen, Bryan would surely be moved before him. Firefighters are easier to place than Lieutenants, everyone knew that. But still, they had to be careful, they had to be completely on the same page. This would never work otherwise.

He needed to talk to her. They had to make sure this was something they both were completely sure about.

But he wasn't so sure he could do that here, not with the prying ears all around this place. They needed to talk somewhere they could be completely alone. The only issue is, he's not sure they'd get around to the talking before they started ripping each other's clothes off.

Shaking those thoughts from his head, Casey continued towards the locker room, knowing there was nothing he could do to answer any of his questions now.

Turning the corner into the locker room, Matt's steps slowed as he saw Bryan standing at his locker, Casey giving him a polite nod before heading towards his own.

"Lieutenant, can I, uh- can we talk for a second?" Walker asked, Casey hearing a hesitation he hadn't heard from the man before. Placing his bag in the confines of his locker, Matt turned around, nodding at him to continue. "I want to apologize, for how I've acted, both on-shift and off." Matt's arms crossed over his chest, Bryan taking a deep breath before continuing. "I made something out of nothing. You hadn't done anything to treat me any differently, and I let my personal life interfere with work and that's not okay. I let my worries cloud my judgement, and you gotta know I'm not usually that guy. It won't happen again."

"I hope that's true, Walker." Casey replied sternly, the firefighter nodding.

"I know I have to gain your trust. That's something you can't just give to anyone, especially in this line of work. I'm sorry for not taking you at your word, for going to Shay, and Dawson, when I shouldn't have. You're my boss, you're the one responsible for making sure we get home okay. I know what you say goes, I'm sorry for making this into a problem when it didn't need to be." He spoke, Casey's face unreadable. "Even though I do wish you had a higher opinion of me, I know I haven't exactly given you a reason to. I know all I can do to change that is show you, through my actions and how I handle myself. I should've never confronted you, and I'm sorry."

Casey's tongue clicked against the roof of his mouth as he thought over Bryan's speech. He seemed sincere, but from everything he knew about this man, Matt wasn't sure if his words were something he could trust. He needed to be careful. No matter how much Casey wanted to believe him, if anything because it would make his life easier, he knew he had to be weary. Someone like Walker, they don't lose their ego overnight.

"Well, you're right. I will need to see it before I believe what you're telling me. But I appreciate you coming to me. You and I don't need to have any problems, Walker. You're a good firefighter, that much I do know. Just keep your head down, do the work. Show me that I have no reason to worry, that I can count on you."

"I will, Lieutenant." He replied firmly, a small smile resting on his lips. He held his hand out, Matt glancing down before shaking it. "You won't have to worry about me."

Casey nodded, dropping his hand, Walker turning to close his locker before heading for the exit.

"But Walker." Casey's voice stopped him, the man looking up at his Lieutenant. "I'm not the only person who deserves to hear an apology from you."

Realization settled over Bryan's face, Casey catching his features hardening before he quickly covered his reaction, Walker taking a deep breath before reluctantly nodding.

"Understood, Lieutenant." Walker gave him one last nod before walking away, Matt turning back towards his locker.

He quickly put away his things, placing his beanie on the top shelf, pocketing his phone as he closed the door, securing his belongings before heading out of the locker room. With his late start to the morning, he hadn't had the chance to go through his usual routine, Casey heading for the common room in search of some food.

When he got there, he found it surprisingly empty, aside from Mouch and Herrmann taking up their usual position on the couch, and a few guys from engine strewn around the room. Walking into the kitchen, he quickly settled on a granola bar and banana, not in the mood to prepare much more than that as he headed back out of the room, stopping to get a cup of coffee before making his way towards the bunkroom.

He knew there was a stack of paperwork waiting for him that needed to be completed, even though that was the last thing he felt like doing at the moment. When he stepped inside the large room, he noticed it was empty, Matt thankful there wouldn't be any distractions while he worked. But as his eyes moved around the room, he caught sight of something puzzling, his steps slowing as he looked to his office, seeing all the blinds drawn, even the one covering the door. He knew he hadn't left it like that last shift, and his confusion only grew as he walked closer, juggling the food in his hands as he saw the door slightly ajar, resting against the frame.

Unsure of what he'd find, he slowly pushed it open with his foot, his eyebrows raising when he saw Dawson sitting on his bed, leaning back resting her palms against the mattress, a small smile resting on her face. Glancing back out into the bunk room, he quickly stepped inside, kicking the door shut, placing his beverage and food down on his desk.

Gabby pushed herself up from the bed when he turned back around to face her, his eyes widened in curiosity as she stepped closer to him, a wicked smirk forming on her face.

"Good morning." She spoke softly, her voice smooth as Matt's tongue darted out over his lips.

"Hey." He responded just as quietly, clearing his throat.

"You were late this morning." She mused, Gabby stopping inches in front of him, her eyes darting to his lips before meeting his gaze.

"Yeah, I, uh," His words faltered as he saw her reach out towards the door, turning the lock, completely shutting them off from the outside world. "I overslept."

She nodded in response, her hands moving towards his waist, grazing over his belt. Matt swallowed the lump in his throat as their eyes locked, seeing the same desire and need pooling in her gaze that he'd seen the night before last. She was about to take whatever she wanted from him, and he would let her.

He knew this was risky, them doing this here. But it was also exhilarating, and he couldn't wait to see what she had in store for him.

Without saying a word, she undid his belt, using it to pull him towards the bed, Casey letting her take control as she stopped him in front of the bunk. Her hands undid his button and zipper, her movements quick as she slid his pants and boxers down past his knees, Matt hissing at the unexpected rush of cold air as she pushed him down onto the bed.

His hands went out steady himself as he sat there, Gabby quickly removing his grey polo, tossing it aside, leaving him exposed to her. Her eyes ran over his chest, admiring the marks and bruising she'd left on his skin, a proud smirk resting over her lips. Matt watched her closely, quickly glancing down to see what she was admiring, a knowing look covering his face. She'd definitely left her fair share of marks on him, almost as if she'd been claiming him. And he was sure if not for the time constraint, she would've already been working on leaving more.

Taking a step towards him she undid her own clothing, Matt's mouth going dry as she pulled down her pants and underwear in one quick movement, the material bunching at her ankles before she climbed on top of him, her thighs straddling him. A soft groan escaped his lips as her skin came into contact with his, his want only growing as he rested her weight on him. One of his hands moved to her hip, pushing her shirt up slightly so he could grip bare skin, Matt adjusting their position so he had more control and balance, preparing himself for a wild ride.

Slowly, she ducked her head, capturing his lips with hers, her movements starting out agonizingly slow. But to no surprise, she soon deepened the kiss, opening her mouth as they began battling against one another, Gabby's hand moving down in between them, lifting her hips slightly to give her room to grab him. With him firmly in her grasp, Matt moaned into her mouth, Gabby giving him a few tight, quick strokes, readying him before she lined herself up, sinking down onto him.

A soft gasp escaped her lips, Casey filling her completely as their hips connected, Matt bringing his free hand up from the bed, sliding it up under her shirt to run over her skin. Within seconds, Gabby began moving, her body bouncing in his lap as they swallowed each others moans, knowing they had to keep quiet.

His hand slid up to her breast, grabbing the skin firmly as they moved at a frantic pace, Matt adjusting the angle of his hips to help their cause, thrusting into her as she matched his stride, her legs trembling.

Their movements were harsh, Matt's hand releasing his hold on her chest, sliding down to her waist, using his grip on her hips to help speed up her movements. He brought them to an unrelenting pace she couldn't reach on her own, their lips disconnecting as Gabby's head fell to his shoulder, heavy pants leaving her lips while she heard Matt's grunts in her ear.

She was closing in on her release, both of them aware of it as she sank her teeth into his shoulder, struggling to silence herself while her body clenched tightly around him, the feeling encouraging his movements. His grip on her hips tightened, sure to leave a few bruises as he bounced her in his lap, impressively hitting all the right spots as her entire body tightened. His hand moved to her center, guiding her through her finish, continuing his torrid pace. It was only seconds later he felt that same high, Casey thrusting through completion as Gabby's body went slack against him. His chest was heaving as he gradually slowed their pace, her body shaking in his arms as he eased them down from their high, Gabby's head resting on his shoulder while they caught their breath.

It took a few moments for both of them to recover, Gabby's body feeling slightly numb as they sat connected on his bunk, his arms moving from her hips to wrap around her waist, keeping her balanced.

"That was…" He breathed out, his voice shaky as he felt her chuckle against him, Gabby pulling back to look at him. He could see a thin layer of sweat covering her skin, her ponytail loose as she caught his gaze.

"Fun." She spoke. "That was very fun." A smile formed over his lips as she put her hands on his shoulders, steadying herself as she climbed up off of him. They both slowly began making themselves presentable, Matt catching her eyes on him a few times as they got dressed.

She handed him his shirt that had ended up on the floor near his desk, an almost shy smile covering her face.

"Thanks for that." She murmured, Matt nodding before sliding his shirt over his head, tucking it back into his pants. He looked back up to her as she adjusted her shirt, Gabby trying to cover the fact he'd had his hands under it moments prior.

"So you're still okay with this? Our… arrangement?"

An almost amused looked covered her face, Gabby scoffing light as she fixed her belt. "Did the sex not clear that up for you?" She questioned with a teasing grin, Matt chuckling in response. "I'm good with this, Casey." She replied, her tone more serious, wanting him to know she was fine. "Are you?"

"I am." He responded, Gabby grabbing the jacket she'd taken off when she first came in here to wait for him, sliding it over her arms. "Are we, uh… are we telling anyone about this?"

Her eyes widened in slight panic, Matt internally cursing himself as he shook his head, knowing he probably should've worded the question better. "Sorry, I just meant that we're both on the same page about not telling people. I didn't mean that as we should. I figured you wouldn't want people knowing, cause off..." Matt trailed off.

Gabby's features softened, releasing a deep breath as she nodded. "Yeah, we're not telling anyone. It's no one's business but ours."

"I just didn't know if you were telling Shay or not…"

Gabby shook her head, zipping up her jacket. "Nope. This is just between us."

He nodded, taking a few steps closer to her. "You realize that means we'll have to be careful, right?" His words were almost challenging, a small grin appearing on her face. "I'm not sure if sex in my office is something that should become a common occurrence."

"I didn't hear any complaints." She responded back with a raised eyebrow.

"Yeah, you wouldn't. But still, as fun as that was, we've gotta be careful."

"I know." She agreed. "And we will. But as long as that means sex at the firehouse isn't always off limits." Her voice was dangerously low, Matt's neck clenching as she leaned forward, placing a heated kiss to his lips, her hand running over his chest before she pulled back. "Have a good shift, Casey."

And just like that she was gone, Matt sucking in a deep breath as he stood there in his office, unable to hide the small grin coming to his face.

He knew they still needed to talk, that there were things they had to figure out. His concerns for their situation needed to be addressed, they were creating a risky situation for themselves and he knew it. But the payoff was far too great for them to stop. He didn't want to stop, and if her body's reaction to him was an indicator, Gabby didn't want to either.

There were parts of this that needed to be discussed, things they had to be on the same page about. But once that was cleared up, there was no reason they couldn't continue their fun.

And he was eager to find out just how much fun there was to be had.

"Hey Shay, can we talk?" Shay looked up from the clipboard in her hands to see Walker moving towards her, his hands shoved in his pockets as he hesitantly came to a stop a few feet from her. She merely raised her eyebrows his response, glancing into the back of the ambulance.

"What do you want, Walker?" Severide's voice echoed through the rig, Kelly stepping down from the back, Bryan taking a step away from them.

"I didn't know you were here…"

"I was helping Shay. What do you want?" Kelly asked again, his arms crossed over his chest. "You come to yell at her again?"

"No, I was coming to apologize." He breathed out, Severide's eyes narrowing in confusion and slight distrust. "I shouldn't have brought you into this. I'm sorry for taking this out on you."

"Mhmm." She hummed, clearly not buying a word he was saying.

"I'm trying Shay. I know I messed up."

"And have you apologized to Dawson yet?" She asked with narrowed eyes, Bryan's defenses rising.

"What?"

"I don't know what you said to her, but I know you said something. And not to mention all the bullshit you've put her through the last year. If anything, she's the one you need to be apologizing to." Shay responded angrily. "Although I have a feeling you're only here because of Casey."

"What are you talking about?" He replied, trying to hide his annoyance.

"You're apologizing because Casey doesn't trust you. I'm assuming you already talked to him, but I know you're only here to try and get on his good side."

Before Bryan could respond, the bells rang throughout the house, calling 61 to a car accident across town. Severide shut the back doors of the ambo, Shay moving towards the driver's seat, glancing back towards Walker as she pulled the door open.

"I don't want your fake apology Walker. Just leave me out this. And leave Dawson alone too, while you're at it." Shay bit out, hopping into the driver's seat. Gabby came running through the double doors, glancing towards Severide and Walker, shooting Kelly a soft smile before heading for the passenger seat, quickly getting in.

"You guys having a nice chat?" Gabby asked, earning a groan from Shay as the blonde drove away, glancing towards Gabby, seeing the woman fixing her ponytail.

"He was trying to apologize, I told him to shove it." She responded, her eyes narrowing as she kept glancing to Gabby.

"What?" Dawson asked, seeing her friend's constant glances.

"Nothing, you just look… weird."

"Thank you?" Gabby questioned with a chuckle.

"Not bad, just different. Something's off, I don't know. You look happy, I guess. It's just different." Shay rambled with a shrug, pulling out into the street.

"Well, I've had a good couple days." She mused quietly, staring out the window while Shay drove.

Severide and Walker both watched as ambo pulled away, Kelly turning back towards him, an unimpressed look covering the Lieutenant's face, Walker sighing heavily.

"I know you're pissed at me, Sev."

"Well, you haven't exactly been the easiest person to deal with lately." Kelly huffed out.

"I know. And you have every reason to be mad at me, hell everyone in this house does. But right now, they don't. And I know it's because they don't know what I did. If they did, they'd hate me just as much as you do. I have no right to ask this of you, I know I don't, but if you could not say anything I'd really appreciate it, Kel." Severide blew out a heavy breath, watching Bryan carefully. "I know I fucked up, and I have a lot of apologizing to do. Gabby and I, we have our own issues to work out. But I don't want to lose my best friend over this, man." Walker spoke, shaking his head. "I've been as ass, I know I have. But I'm trying to be better, I'm trying to change. This last year, I was a wreck… And it doesn't excuse what I did, nothing does, but I wasn't myself."

"Why didn't you come to someone, instead of just sleeping around behind Dawson's back? Whatever was going on, we could've helped you instead of you doing that." Severide questioned, unable to understand his reasoning.

Bryan sighed, shrugging his shoulders. "I don't know. I shouldn't have ever cheated on her. When it first happened, I felt sick. I felt awful for doing that to her. It was an accident. But then it kept happening and I didn't know how to stop it. I was ignoring my problems, mine and Gabby's problems, and it just… happened. There's no excuse for my actions, I know it's my fault. I should've broken up with her, or come clean the first time it happened and tried to fix things. But Gabby and I, we didn't work. We never did, we weren't going to. I should've ended things long before I did, but I didn't and I can't take that back." He paused to take a breath, Bryan's hand coming up to rub over the side of his face. "I never meant to hurt Dawson. And I know that sounds like a lie, because of everything, but it's not. I swear. I don't wanna be the guy I've been anymore. I'm trying to be a better person."

"Have you told her all this?" Severide questioned, Bryan's eyes darting away from him, his actions answering Kelly's question. "Maybe you should start with that. Whatever was going on, it's not enough to excuse what you put her through. You need to apologize to her. Even though it can't change anything, at least let her know you're sorry."

"I know I need to talk to her. And I will. But I want you and I to be okay. You're my best friend, Kelly."

Severide blew out a heavy breath, his eyes falling closed as he thought over Bryan's words. He wanted to believe what he was saying, that he never set out to hurt Gabby. But he was having a hard time accepting Walker's apology. He didn't want to lose his friend, but Kelly couldn't shake the feeling that he never really knew Bryan in the first place.

"Just… if you could think about it. I'd appreciate it." Walker spoke, shooting him a small smile before turning around, heading back into the firehouse leaving Kelly out there alone to think through everything.

Gabby sat on the couch in Antonio's apartment, her hands resting in her lap as she tried to force herself from checking her phone. She knew she had no messages, from the three times she'd checked to make sure her sound was on, she knew she'd hear any attempt to contact her. She hadn't missed anything, and she knew it. But she couldn't help but feel like she should check to make sure.

Taking a deep breath, her will lost out as she picked up her phone, groaning when it was confirmed she had no messages. She wasn't even sure why she found herself so antsy, she could easily text him first, but she was hoping he'd be the one to reach out. She knew they hadn't made any plans to meet up tonight, in fact she wasn't even able to see him before the end of shift today, ambo having been out on a call all morning, everyone from second shift long gone by the time they returned. All she did know was he had a construction job today, something she learned from overhearing his and Kelly's conversation last night.

After their morning in his office yesterday, they had barely seen each other, let alone had a moment to themselves. She had no reason to expect to hear from him, but still she sat here hoping she would.

Sucking up her pride, she opened her messages, blowing out a sigh as she sent him the short message.

'You free?'

She knew she didn't have to pretend to hide her reasons for seeking him out. They weren't together, there was none of her having to act like she just wanted to hang out. She wanted sex, and he could give it to her. She had no reason to be ashamed of that.

Gabby saw him read the message soon after she sent it, her bottom lip falling in between her teeth as she waited for his response.

'Yup. Just got out of the shower, too bad you didn't text me earlier, I would've waited for you.'

Gabby rolled her eyes as she pushed herself up from the couch, heading towards her room to get ready to go. As she was sliding on her boots, she heard her phone ding, Gabby picking it up to see another text from Matt.

'Should I be expecting you?'

She stood up from the bed, slinging her purse over her shoulder as she began typing back her response.

'If you're lucky.'

As she started heading towards the door, she heard the keys in the lock, her steps slowing as she came face to face with Antonio, her brother jumping slightly when he saw her near the door.

"Jeez Gabs, you scared me."

"Sorry." She responded with a grin.

"You heading out?"

"Yeah, uh, just gonna run over to Shay's for a bit. I'll be back later."

"Alright. I hope you two have fun." He replied, bringing her in for a quick hug. With their hectic schedules, she hadn't seen much of her brother lately, the two mostly passing ships in the morning before work. "I'm glad you're spending time with her, I know how much she means to you. And it's seemed to definitely help."

"What do you mean?" She asked with furrowed eyebrows, the two pulling back from one another.

"You just look like you're doing better. You've seemed a little happier the last few days. I've been worried about you, but you seem to be getting past what happened." He replied, Gabby nodding slowly. "It's just good to see you happy, again."

"Thanks Antonio." She spoke softly, Antonio patting her arm before stepping past her.

"Tell Shay I said hi. I'll probably be asleep by the time you get back, but I hope you have fun."

Gabby nodded, heading towards the door. "I will. I love you, big brother." She responded, Antonio's smile widening.

"Love you too, sis."

After one last goodbye, she exited the apartment, beginning the walk to the lobby. She felt a little bad for lying to her brother, but she couldn't exactly tell him who she was going to see, or why she was going to see them. It was better this way, no one knowing their arrangement. And she'd be lying if she said it didn't make it all the more fun.

Within fifteen minutes she'd gotten to his apartment, the late time of night making it easier on her commute, Gabby climbing out of her car and locking the doors before heading for the sidewalk, seeing a few lights on in his home. Climbing the steps, she brought her hand up to knock on his door, hearing shuffling behind the wood instantly, a light chuckle leaving her lips as she heard him unlocking the door.

She was quickly met by Casey, seeing a smug grin covering his face as he opened the door.

"Back already?"

"Shut up." She replied lightly, pushing against his chest to make him move to the side, Matt complying as he stepped back, giving her room to enter.

"So, I guess I got lucky, huh?" He questioned quietly, repeating the words from her last text. Gabby's eyebrows raised as she took a step towards him, a challenging smirk covering her face.

"Well, you're about to."

She closed the distance between them, her lips on his before he could even get the door shut, both of them eager to enjoy their evening together.

Well, how are you guys feeling? Gabby and Matt seem to be, uh, making the most out of their new arrangement, and it seems like Bryan is trying to make amends with people. Well, some people. Probably not the right people. But I'm interested to see what your opinions are on that. Do you all believe him? Or are you more where Shay's at with this whole thing.

I can't wait to hear what you guys thought about this chapter, and what you think might be coming. Thank you so much for reading!