On Your Side
Pairing: Dad!Kelly Severide x Reader
Requested: no
Summary: When Kelly’s daughter is faced with a new confrontation that she can’t handle on her own, Y/N steps in, changing the dynamic for all three of them.
Word Count: 2.3K+
Tags/Warnings: Dad!Kelly, mentions of anxiety, feelings of being unwanted, single parent
A/N: Hiii, just one of those ideas that got away from me. Also in my Kelly feels so here's a Kelly fic after a long time!!
KELLY SEVERIDE MASTERLIST
You picked up your phone on the second ring, just as you were about to open your car door.
“Hey, shift over?” You asked.
You heard Kelly let out a little chuckle. “Soon. I need a favor.”
“Shoot,” You answered, propping your phone between your ear and shoulder as you climbed into your car.
“Ellie left one of her school files at my place, and she needs it today. She’s freaking out about getting in trouble. Can you swing by and get it, then come meet us at our usual breakfast spot?"
Without any trace of hesitation, you immediately agreed. “Sure, I can be there in 15.”
“Thanks, babe. I think it should be on the kitchen counter. See you soon.”
You hung up and made the all too familiar drive to Kelly’s place.
You’d known Kelly had a 12-year-old daughter even before you’d started dating. Kelly shared custody with his ex-girlfriend, and Ellie was given pretty free reign to decide when she wanted to sleep over at Kelly’s, as long as he wasn’t on shift.
You had a pretty cordial relationship with Ellie even though things had been a little awkward at first. You could tell that Ellie had tried her best to accept your presence in her father’s life, so you’d also done your best to give Ellie the space she needed while also making sure she knew you were happy to spend time with her and Kelly.
You made the quick trip to Kelly’s place and sure enough, 15 minutes later, you’d pushed open the diner door, spotting Kelly with his daughter in her usual favorite booth seat.
“Here you go.” You said with a smile, handing her file to her across the table.
Ellie smiled back at you. “Thank you. Sorry for the trouble.”
You smiled back. “No trouble. So, what are we having today? Pancakes?”
Ellie stuffed a forkful of pancakes into her mouth. “Dad wanted to order that for you but I told him he should just order the sausage platter instead."
“El, you better eat if you want to make it to school on time.” Kelly said, a tinge of a smile playing on his lips.
Ellie had just made a face at her father when your breakfast arrived at the table, a plate with a generous serving of sausages, hash browns and eggs.
“You know me much better.” You said, as Ellie smiled.
Kelly smiled as the both of you joked at his expense, but he was just happy that Ellie seemed much more at ease recently. There was still a tinge of awkwardness once in a while, but you’d reminded him it was to be expected and that you were fine and didn’t mind.
Ellie sat across from her mother’s boyfriend, Jake, feeling her stomach flip over and over.
“So, Ellie, I know you’ve been living with your mother for many years. Maybe it’s time for you to go live with your father.”
Ellie glanced up, feeling the pit in her stomach grow larger.
“Don’t you think this is too much for me? I’m barely in middle school. Why are you talking to me?” Ellie asked.
Jake gave Ellie a small smile. “Because it should come from you. You should tell your mother that you want to live with your dad. That would put your mom at ease.”
When Ellie didn’t say anything, Jake continued. “Listen, Ellie. Your mom hasn’t gotten around to telling you this but she’s pregnant. We’re having a baby.”
The words seemed to thunder through Ellie’s brain almost like they were going to swallow her whole.
This was the part she’d always been afraid of - her mother moving on, her father moving on. She could feel her body start to tremble just slightly.
“So, you see? It’ll be hard for all of us to keep staying together, right? Your mom has taken care of you all these years so don’t you think the baby should get some of that love, too? Besides, it'll be too much of a squeeze, don't you think?”
Ellie tugged at the hem of the sweatshirt she was wearing before she spoke again, her voice trembling slightly. “Does Mom know about this?”
“Ellie, Jake talked to me about it.” Almost as if on cue, Ellie heard her mother’s voice but it didn’t make her feel better or safe. "Come on, don't make things more difficult than they need to be."
Her mother had known. In fact, she was on Jake’s side.
"Ellie, you understand, don't you?" Her mother pressed again.
Then, another voice pierced through the fog that seemed to be about to engulf Ellie.
“What the hell do you think you’re doing?”
Ellie’s head snapped up just as you reached the table. You stood close to Ellie but still angled in a protective stance right next to the table they were seated at.
You’d been seated two tables away and the voices had traveled toward you. You’d hesitated about getting involved. After all, you weren’t sure how Ellie fit into all of this and honestly, you were in no place to talk to Ellie’s mother about her own daughter.
However, it had hit a nerve and you couldn’t sit back any longer. Before you knew it, you were already standing in front of Ellie.
“She’s a kid.” You said. Then, you turned toward Ellie’s mother. “She’s your kid.”
“You stay out of this.” Her mother snapped. "I don't need Kelly's new piece telling me how to take care of my daughter."
“I can’t. Not if you’re going to make Ellie feel like she’s an inconvenience. I won’t stand by and let her feel like she’s being dismissed. You…”
You were interrupted as you felt Ellie’s hand close around a couple of your fingers.
You turned to glance at her in surprise, half wondering if Ellie wasn’t too happy about you getting involved.
“Y/N, I wanna go.” Ellie’s voice was soft but firm.
This was also the first time she’d directly told you what she needed.
You nodded. “Shall we go see your dad?”
Ellie glanced up again. “Could we?”
“Yeah, come on. I’ll take you to the firehouse. Get your stuff.” You told Ellie before you led her out of the restaurant without another word.
You’d driven all the way to the firehouse in mostly silence, only breaking the silence once to apologize to Ellie for getting involved.
Ellie had just shook her head without saying anything.
You’d always known that Ellie’s mom wasn’t the greatest at decision making. She cared about Ellie in her own way but ultimately, she put her interests first. It drove Kelly crazy but at the same time, Kelly wasn’t keen on making too many big changes for Ellie’s sake, so he left it alone as long as Ellie was safe and relatively happy.
But today, things had gotten a little out of hand.
“Come on.” You said, as you killed the engine and got out of the car, leading the way in.
Kelly’s usual chair was empty, so you figured he was in his office.
“Hey Joe. Kelly around?” You asked, as the firefighters who were outside greeted Ellie enthusiastically.
“Hey, you guys! Yeah, he’s in his office. You want me to get him?” Cruz answered, flicking a concerned look at Ellie who seemed quieter than usual.
You shook your head. “No, we’ll go in.”
Cruz nodded and you led Ellie through the firehouse, waving at the rest of the guys in the common room, heading straight for Kelly’s office.
He spotted you just as you were approaching the office and he frowned.
“Hey, what’s…”
Kelly caught the look on Ellie’s face. “El?”
Ellie didn’t say anything, just walked straight into her father’s arms, burying her face into him.
Kelly was caught off-guard but still put his arms right around her. “What’s wrong?”
Ellie didn’t say anything but glanced at you.
“Hey El, why don't you go right in. I'll talk to Y/N for a bit then I'll come in, alright?” Kelly said, patting his daughter gently on the back of her head.
Ellie nodded, closing Kelly’s office door behind her.
Kelly took another glance at his daughter before he turned toward you.
“You good? What’s going on?” Kelly asked.
Honestly, you should have asked Ellie how much she wanted you to tell her father. Instead, here you were, stuck wondering how much you should tell Kelly.
Ultimately, you knew Kelly had to know everything, so you condensed it as much as possible, telling him everything you heard and saw.
You saw the emotions flicker across Kelly’s face - worry, disappointment, anger, and then worry again.
“Look, Kelly. I’m sorry.” You said.
Kelly frowned now. “What are you sorry for?”
“I know I shouldn’t have gotten involved. I just…” You paused. “I couldn’t let her sit there thinking she was unwanted. I know what it’s like. Hell, I was Ellie. Except, I didn’t have a father I could count on.”
Kelly leaned in to press you into a hug. “Thank you, Y/N.” He whispered, after a short beat.
“Hmm?” You hummed, even as you welcomed the hug.
“For being there for her.” Kelly said in a low voice.
You pulled away just slightly to look at him. “Look, I gotta run to a meeting but listen… you should do what’s right for her, alright? We’ll adapt around her. Whatever you decide, I’m good. Promise. Talk tomorrow?”
An unreadable look crossed Kelly’s eyes but he nodded. “Yeah, we’ll talk. Go do your thing.”
Kelly reached over to press a kiss against your lips.
“Be safe.” You said, before you turned to leave with a final wave to Ellie.
Kelly watched you go before he turned back around to glance at his daughter who was sitting perched on his bed.
With a small sigh, Kelly headed toward her.
Ellie looked up when Kelly came back in. “Dad, I…”
Kelly sat himself next to her. “Y/N told me some of what happened.”
Ellie just nodded, looking down.
“Why don’t you tell me what happened?” Kelly pushed gently.
Ellie exhaled before she looked up at her father again. “Mom’s pregnant.” She paused. “So, he told me to go stay with you.”
Kelly already knew this, yet he couldn’t help the way his body stiffened.
“Mom didn’t even argue.” Ellie shrugged.
Kelly exhaled slowly. “El, listen…”
“But Y/N did.” Ellie said, getting the words out quickly as if she was afraid she wouldn’t say it again if she lost this opportunity.
Kelly fell silent again.
“Y/N… she… no one other than you has ever done that for me.” Ellie said quietly. “Not even Mom.”
Kelly leaned toward Ellie, pulling her gently into his arms.
“El, what do you want?” Kelly asked.
Ellie looked up at her father.
“El, I told you before. You can stay with me whenever you want. So, what do you want to do?"
Ellie hesitated. “Dad, can I come live with you? I promise I won't get in your way."
“I would love to have you with me.” Kelly said quietly, pressing a kiss to the top of Ellie’s head. "You don't have to earn your right to be with me. You were born with that right."
Ellie just quietly buried her face into Kelly’s embrace.
When you arrived at the loft the next day, it was empty.
You figured Kelly and Ellie would be here soon. Kelly had dropped you a text to let you know that Ellie was staying with him at the firehouse that night and they’d be home once his shift was over. You didn’t need Kelly to tell you anything else.
You knew.
Ellie had been an unplanned pregnancy. In fact, Kelly had only found out after they’d broken up but Kelly had always been involved in Ellie’s life. So, it was a given that Kelly would choose the best for his daughter, and if that meant living with him, you knew Kelly would do it.
So, you headed into Kelly’s bedroom, clearing out some of your stuff that you’d left there before heading to the second bedroom and cleaning it up a little.
You figured Ellie would be feeling a little raw and vulnerable, so you didn’t want her to feel like this wasn’t her home.
You’d just straightened up most of the room when you heard the main door open.
“Hey.” Kelly greeted, heading toward you and giving you a quick kiss.
“Hey, good morning Lieutenant.” You said, before turning toward Ellie.
“Hey Ellie.” You greeted.
Ellie smiled at you as Kelly put Ellie’s bag on the ground.
“So, listen. I spoke to Ellie’s mom. We decided that Ellie would stay here. I think a change of pace will be good for her anyway.” Kelly said.
You nodded and smiled. “That sounds like a good plan.”
There was a small silence and Kelly’s eyes flicked to the small bag by the couch.
“Y/N?” Kelly asked, an eyebrow raised.
You smiled at Kelly. “Listen… I figured you guys might need some space… So, I can come around less for a bit. At least until things settle.”
Kelly frowned. “What…”
“You don’t have to go.” Ellie interrupted.
Both you and Kelly glanced at her.
Ellie was already settled into the couch, looking at the both of you.
“I… I want you here.” Ellie said quietly.
“You sure about this, Ellie?” You said. “I’m not… I’m not really leaving. I’ll just come around here less. We can still have breakfast and…”
Ellie shook her head. “No, I want you to stay. Please?”
You paused, your eyes scanning Ellie’s face.
“Yeah, of course.” You paused. “Thank you, Ellie. And if you need anything, you know you can come to me. I love hanging out with you. At least I have someone on my side when your dad’s being difficult.”
Ellie cracked a smile and Kelly’s hand closed around yours.
“Thank you, Y/N.” Ellie said quietly.
You smiled. “I’ll always be on your side, Ellie. Even against your dad.”
Ellie smiled, but after a beat she spoke again. “And, it’s El.”
You paused. Ellie usually only let her dad call her that.
You echoed her smile as it sunk in. “El, it is.”
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