A/N: Hello wonderful readers! The lovely reviews inspired me to continue this little one-shot a bit. I have a few more ideas to add to this, so here is the first of those.

Disclaimer: I own nothing related to Chicago Fire.

Fixing Stupid Mistakes

Gabby wondered if Matt could hear her pounding heart in the silence as she led him into the house. She dropped her bag in the living room, thankful that there was no sign of Brett. She stood facing him, her back to the kitchen were only days ago things had seemed so much better between them.

They stood there in silence for a moment, both waiting for the other to say something, "Do you want something to drink?"

"Oh, no, thanks," Gabby was relieved, she did not want to go back into that kitchen with him. Unfortunately, this still left them standing in silence.

She had finally had enough, "You said you wanted to talk, Casey."

"I wanted to apologize about Beth…"

"Stop," Gabby cried, her voice coming out raspier than she wanted it to, "I really don't need to hear about the girl you slept with."

"Okay," Matt held up his hands in surrender, returning the room to silence for a second, "I didn't cheat on you."

"I know that!"

"Okay, but you're still mad."

"I'm not mad," Gabby snapped quickly before taking a deep breath. If she wanted this to work she would have to talk to him. That was their problem last time, "I'm upset, confused."

Matt immediately softened, almost reaching for her but somehow thinking better of it, "You are the one who wanted to take a break. Focus on your candidacy."

"I did, but I thought after our talk…" She took a moment to work out the words, "We said we were putting us on hold."

"I didn't realize that meant not seeing other people."

"I didn't realize you wanted to see other people," Gabby shot back just as fast.

"I don't," He growled.

"Well it didn't seem like that when you slept with Beth! I had to find out from Welch! She was at the firehouse!"

"She was there to see her soon to be ex-husband, the new chief." Casey admitted quietly as he sunk down on the couch.

Gabby let out a strangled sound, between a laugh and a cry, "Well isn't that just perfect. You sure know how to pick them."

"Hey," He rose off the couch, "What do you want from me? I was prepared to spend my life with you, you called it off."

"Put it on hold. You were the one who told me it was okay, for my career."

"You moved out! I thought we would keep the engagement quiet, not split."

"This is getting us nowhere," Gabby sighed as she rubbed her hands over her face.

Matt let the silence sit in the room for a moment, "I was going to tell you… about what happened."

Gabby's stomach lurched at the thought of that conversation, "That might've been worse."

Matt sighed, "What do you want from me Gabby? We can't be together, but I can't be with anyone else. You can't have it both ways."

"I know," She sighed. This was it, it was now or never to make a choice. They couldn't keep playing this game, "I was wrong."

Matt's head snapped up at her quiet confession, "What?"

"I don't want to put us on hold anymore." He stood up and moved towards her, "I thought it would be worth it, but it's not. I really messed up."

His arms moved to rub hers comfortingly, no longer afraid she would lash out if he touched her, "You didn't mess up, but you have to be sure this time. Is this what you really want?"

She nodded without hesitation, "You?"

"I always want you," He hesitated for a moment, "Can I kiss you now?"

Gabby didn't answer, pressing her lips against his in a passionate kiss, her arms wrapping around his neck as his moved to her waist, "I missed you."

"I missed you too," He wholeheartedly agreed as his rested his forehead against hers, "Let's not do something this stupid again."

"Agreed," She hummed before kissing him again. His hands wandered, untucking her work shirt and spreading warm against her back. She broke apart from him for a moment, "My room, Brett might come home."

He nodded, kissing her hungrily as she led the way out of the living room and into her bedroom. Gabby's mind flashed back to their first night together, him showing up at her apartment just as she was leaving to find him. Their kisses were hard and passionate, clothing quickly littering the floor of her bedroom.

Matt lowered her onto her bed, quickly following and finding her mouth again, "I love you."

"I love you, too," She answered, "Now, shut up, Lieutenant."

"Yes, ma'am."

It was a few hours later when Gabby watched from bed as Matt gathered his clothes from her floor, he turned to her with a smile before breaking the moment, "How are we going to do this?"

"What do you mean?" She asked concerned as she sat up in the bed.

"Are we together? Engaged?"

"Together," Gabby answered, "I think we should start new. Forget the past and take it slow."

Matt raised an eyebrow at her, "This was slow?"

She rolled her eyes, "You know what I mean. From here on out we take our time, do better."

He grinned, moving to kiss her, "I agree. We will get it right this time."

"We have to," She agreed.

"We have to be careful. It's not Boden we are dealing with."

"We keep it out of the firehouse. Just the two of us for now."

"Brett and Severide, we both have roommates. We will never have a moment alone."

Gabby sighed, "I still think we should keep it to ourselves for a bit. At least until we figure out how to make it work."

"Okay," He agreed, kissing her one more time. "I need to go, I have a construction job in the morning."

Gabby nodded, suddenly sad at the prospect of him leaving, "Okay."

He kissed her again, "I'll call you tonight. We will figure this out."

Gabby nodded before speaking, "Tell Severide. I'll tell Brett. We can trust them, and then at least we can be together outside of work."

"You sure?"

"Positive."

Matt smiled and nodded as he continued to get dressed. Gabby moved to put on some lounge clothes before walking with him out to the living room, "I'll talk to you later?"

"Absolutely," He agreed kissing her again. "How about dinner tomorrow night? Our first reunion date."

"That sounds amazing," She agreed as he kissed her one more time, they only separated at the sound of a gasp.

"I'm sorry," Brett squeaked, "I uh, didn't know."

Gabby smiled at Matt as she waved him off, he moved quickly by Brett and out of the house, "I guess we should talk."

"I brought wine," Brett offered as she moved further into the house and Gabby laughed, "Tell me everything."