Author's note: Hello everyone, thank you for all the comments and reviews about the last chapter of this story. I wasn't really sure about this, but your comments tell me you like it and nothing can't make me happier in the "fanfictionland"! I hope you'll love this third chapter as much!

I apologize for some grammatical errors or conjugations, I do my best.

Have a good read and don't forget to review, it's always a great motivation!

Gaëlle

MATT'S POV

When I arrive at my destination, I take my phone and see that Kelly answered me: "Don't worry, I take care of her. Be careful though."

I work at Stilettos, a strip club, for a few weeks. It's a big and important job which could be really great for my reputation. But the relations with the owner Jack are definitely weird; I can definitely say this man isn't totally honest about his job, his girls and everything. My suspicions were confirmed a few days ago when my worst enemy Voight called me and ask me to meet him at the district. And this is where I am this morning, leaving the love of my life to meet Voight and her brother in all discretion.

I enter the building where Antonio is waiting for me: "Hey Matt!" he welcomes me.

"Hey Antonio, how are you?" I ask him.

"I'm good. How about you? Are you ready for this meeting? I know this is weird, but some things are really wrong in this club and you're our best ally out there…" he explains me.

"Yeah, I guess I'm ok… I just need to ask you one favor?" I tell him.

"Yeah, of course, go ahead!" he answers.

"Don't tell anything to Gabby… The club, the probable undercover… Anything…" I beg him.

"Why are you so worked up about this? I'm a little confused here… You two are not even dating anymore…" he says looking at me, confused.

"That's the point… We're finally back together and I don't want anything to ruin it. I just want to marry your sister and spend my whole life with her…" I tell him, heart to heart.

"Wow… Man, I'm happy you two are back together. But I swear to god, don't hurt her or you will have to reckon with me each time you misbehave…" he warns me, like he always did.

"I promise! You know I love her, we had a bad period but this can happen even to the best people…" I say.

"Fine… But do you really think lying to her about your job and everything that goes with it, it's great for a fresh start?" he asks me, worried.

"I admit it's not the best, but I think it's the best to protect her from this Jack and his guys… I don't want him to know I have someone in my life, so he may takes revenge on her, you know... I just want to be sure she's totally safe and I will deal with the consequences later… So please don't tell her anything even if she begs you…" I tell him.

"I promise, but just be careful, I can't deal with a Gabby in fury! Just remember, you're not in this thing alone!" he says, smiling, before guiding me to the first floor where Voight is waiting for us.

GABBY'S POV

I get ready to go to Brett's apartment and announce her that I'm leaving her place to move back with Matt. Kelly proposed to accompany me to help me pack my stuff and move them back to the apartment I used to share with the man I love, the apartment I rent with him last summer. I'm really excited to move back, but still worried about Matt.

Once in the car, while Kelly is driving, I ask him what's been eating me this last hour: "Is there some problem I should know about Matt?"

"What? What make you ask that?" he answers, confused.

"I found him very distant and vague this morning when he spoke about his construction job... I am sure that he hides me something…" I say, sincerely.

"Oh, don't worry, I'm sure he's just very busy, that's all…" Kelly answers.

"If something was wrong, you'd tell me, right?" I ask him, not really trusting him right now. I'm sure that he knows what's going on with Matt and he's not telling me.

"Of course… Gabby just breathe, everything is going to be okay. You're back with the man of your life, you're moving back in your apartment… it's the only things you need to focus on." He says.

"Well, focus on our fresh start thinking he's lying to me is not the ideal… We need to be honest with each other, no matter what, or we are going to make the same mistakes and if there's one thing I don't want to, is that." I tell him, honestly.

"All will be fine, don't worry!" he says, squeezing my shoulder before parking the car in front of Brett's door.

"I'm going to talk to her before. Do you mind waiting in the car?" I ask him, opening the door.

"Of course, I'm waiting here. Take your time!" he smiles to me.

MATT'S POV

Antonio and I sit down in the office of Voight. This man disgusts me, he is so conceited. Our common past is always in my memory and I cannot refrain from rethinking about it.

"Well, Casey, I know we're not best friends, but I need you for an undercover job in the strip club you're currently working on. A lot of things are going on in this place, and we need your help to take Jack down." He explains.

"I get it, and I'm ready to help. But I want Antonio with me, not you. I don't want anything to do with you. I trust Antonio; I don't trust you for my safety or for anything else." I say, not really sure of what I'm doing here.

"I agree with the fact that Antonio will be the one helping you in your mission, but you'll have to work with me too. I'm the boss here, I'm Antonio boss and I'm the guy who decides here. Is it not plain enough to you? " He says, assured and mighty.

"It's perfectly clear, but I still don't trust you. I can't forget all that have happened between us and between you and the Dawsons too." I answer him, looking at Antonio. "I will spy Jack, I will try to find what he's hiding and what's going on between him and the girls working in the club; but I just want to make sure I'm safe and the people I love too. I can't lose… I can't lose Gabby or my close family and friends because of this undercover job… Is it not plain enough to you?" I am resuming his own words, by looking at him scornfully. He wants to play the cunning, but not with me, at least not anymore.

"Fine, you have my word. You'll have Antonio with you all the time and I will make sure your people are safe." He promises.

"Thanks, I appreciate that." I answer him.

"So, now everything's clear, we need to talk about the mission and how we are going to do this!" Antonio finally speaks.

"Ok, so here's the plan Casey. You'll continue working as you already do, but you have to keep those little ears open at any time. You'll be our man inside the club, you're the one who will talk with the girls and question them about their past, on how they arrived in Chicago; on their relations with the boss and the clientele... The ideal would be that you manage to be embedded in the meetings of Jack with these mysterious businessmen who want to spread the business of the club." Voight explains to me.

"Speaking about that, Jack offered me more work for these businessmen last Saturday… I said no, but I can go back on this decision." I tell him.

"Yes, it's the first thing you'll do. When you'll arrive at the club, you'll talk to him and tell him you agree to his offer. But if you want to be credible, you'll need to have more time off. Do you think you can take a few days of vacation from the firehouse without arousing of possible suspicions or questions from your guys?" he asks me, and I feel the anxiety rising in me.

"Severide and the Chief are aware of the situation, so I'm not afraid for the firehouse. I'm more afraid about Gabby; she was already asking a lot of questions about my job this morning and I'm not the best one to lie to her… She knows me by heart… I don't know how I will be able to keep it from her…" I say, running my hand through my hair.

"Antonio, any ideas about how handling your sister?" he asks, sarcastic.

"Considering she's working and living with him, not really… Maybe it'll be more simple if we tell her the truth, Matt…" Antonio says.

"No, that's out of the question, Antonio. You promised me!" I tell him in an angry tone.

"Fine… Why not simply tell her that you need some free time to honor your contract, that you saw it with the Chief, that he agreed and that it's just about one or two shifts…" he proposes.

"Yeah, I will talk to her tonight." I say, not really sure about this conversation.

GABBY'S POV

I open Brett's front door, and she's waiting for me in the middle of the living room, impatiently.

"So, I guess your plan was good, right?" she asks me, smiling.

"Oh yes, you can't even imagine. Last night was amazing. We decide to take a fresh start… So…" I answer her, not really knowing how to announce her I'm leaving.

"So, you're moving back with your fiancé, right? That's what you're trying to tell me. Don't worry, it's totally understandable. And don't worry, it doesn't end our friendship, and you'll always have a room here." She tells me, hugging me. "I will miss you, but I'm so happy for you."

"Thank you so so much! And don't forget, mermaids for life!" I tell her, laughing. "Severide is in the car waiting for me, to help me pack my affairs, I'll get him!" I say, going outside.

We spend the afternoon all the three of us to pack my affairs, laughing and having a good time around beers. I begin to relax, but still think about what Matt could well hide me.

"We should go home, maybe Matt's waiting for us!" I finally say.

"Oh no, he texted me an hour ago, telling me he still has a lot to do at the cl… at the Lake House." Kelly answers me, unsure.

"Kelly Severide, what the hell are you hiding from me?" I raise my voice.

"Nothing, I swear!" he answers, putting his arms up in defense.

"YOU'RE TAKING ME HOME RIGHT NOW AND YOU EXPLAIN ME EVERYTHING! EVERYTHING!" I yell. He's not around to object.

We say goodbye to Brett and make our way to the apartment in total silence. I can't help myself but tapping my foot in sign of irritation.

SEVERIDE'S POV

Once home, Gabby gets out of the car within a second and slams the door. She's definitely angry, and I don't know how I will handle her tonight waiting for Matt to come home. I take my phone out of my pocket and text him: "I almost made a blunder... Gabby definitively suspects something and she is very irritated against the two of us. Come on fast."

"You're texting him, right?" she asks me, waiting for me behind the front door.

"No, no… I was just answering April…" I lie.

"You're a terrible liar Kelly Severide!" she says, opening the door. Once inside, she throws her affairs on the sofa, and remains standing in the middle of the leaving room. She crosses her arms on her chest and look at me intensely: "I'm waiting... "

"Look Gabby, I understand you're mad… But I'm not the one you should talk to right now." I say.

GABBY' S POV

"I totally agree with you, but the person I'm supposed to talk about everything, including our jobs is nowhere to be seen right now and he's really distant about his job. And I guess he's not at a Lake House like he pretended this morning, so just SPILL IT OUT KELLY!" I start yelling again. I'm mad at him, but mostly at Matt. We decided to start new, and after one night there are already liars.

"Gabby, please…" he begs me to wait for Matt.

I'm all teary-eyed and I start to tremble because I'm so upset. Kelly gets closer to me; he embraces me to reassure me. I feel the anxiety rising in me and I don't feel good at all. Kelly pulls me towards the sofa, pushes my affairs and helps me to stretch out. He puts a blanket on me and stay by my side trying to reassure me.

"It's going to be okay, I promise…" he whispers sweetly.

After 30 minutes of anxiety attack and crying jags, I slowly fell asleep on the sofa and on Kelly's arms.

MATT'S POV

After having read the SMS of Severide, I panicked and I take the road as soon as possible.

I arrive at the apartment a small hour later, and I am surprised by the scene which waits for me. Gabby is dozing off on the sofa in the arms of Severide. I look at them with big and surprised eyes.

Kelly sees my reaction and simply tells me: "You really need to tell her the truth, she's a mess Matt. You two have just got out of a bad period...Don't waste everything. This girl truly loves you, more than anything."