They arrived back at 51 after spending most of the day at the scene, Casey was covered in soot and grime. It was almost the end of shift, but he still had to supervise his team cleaning and storing their gear. Then he did his paperwork while they hit the showers. As most of his coworkers were leaving for the day, he headed into the locker room to clean up.

Sylvie was searching for Casey to see if he was ready to go home, but he wasn't in his office. Stella was walking down then hall, running her fingers through her wet hair, she spotted Sylvie standing in the hallway and sauntered over. "If you're looking for Casey, he's in the showers," Stella said with a sly smile. "Why don't you join him?" She said, winking.

Sylvie blushed, "Um, I don't think so," she laughed nervously.

Stella shrugged, "your loss." She waved goodbye and walked down to meet Kelly, taking his hand in hers, they disappeared around the corner. Sylvie waited a little longer, watching third shift make their way to the break room. She thought about what Stella said, and mustered up her courage, slipping back into the locker rooms to the showers.

Only one shower was running, and she slipped behind the first curtain, noting Casey's Captain shirt in a pile on the floor. Well that at least confirmed she was in the right place. She quietly pulled off her clothes, quickly folding them and placing them on the bench next to his civilian clothes. Taking a deep breath, she nervously stepped around the next curtain into the shower.

Casey gasped in surprise, but his eyes lit up when he saw her standing there, undressed. He quickly pulled her to him, their lips meeting with a new intensity. His hands were all over her, and as he pressed her body up against the shower wall, she ran her fingernails softly down his back, causing him to let out a low moan.

"Hello?"

They both froze, someone else was also in the locker room.

"Um, yeah?" Casey said, his eyes wide, looking at Sylvie with a panicked expression.

"You okay in there?" The person called.

Sylvie suppressed a laugh, and Casey rolled his eyes at her. "Um, yeah, just a sore shoulder, I'll be good."

They heard the distinct sound of footsteps walking away, and Sylvie teased him in a whisper, "you're going to have to keep the volume down, Captain."

Damn, she was hot. She kissed him, nibbling on his lip as her hands ran down his body, and he suppressed another moan. This was entirely out of character for both of them to be so wild and reckless, but he was enjoying getting to know this side of her. Not only was he attracted to the kind, caring, thoughtful Sylvie Brett, but in combination with the sexy, seductive, secretive Sylvie only he knew, she was perfect. As he pulled her body to his he couldn't help but think he was falling hard for her.

Casey was grabbing his things from his quarters when he ran into Boden.

"You're still here?" The Chief questioned, glancing at his watch.

"Um, yeah I was making sure all the gear was washed good, see ya next shift," Casey said quickly, hurrying out to the truck where Sylvie was waiting, Boden's eyes following him curiously. Casey hopped into his truck, grinning at the pretty blonde next to him. This was definitely a view he wanted to get used to.

And so the weeks went on, Sylvie barely spent any time sleeping in her own bed anymore. She spent her nights curled up next to him, and her time at firehouse 51 pretending like they were just good friends. Recently, her job was really wearing on her, and she came home every day exhausted, and would take naps in his bed without him. One particularly rough day, they got home, Sylvie felt like she wanted to lie down, and Casey was concerned.

"Are you sure you're okay?"

"Yeah, just tired," she told him. "I'm going to lay down." She headed back to his room, cozying into the covers and falling asleep. While she was sleeping, Casey worked at cleaning up the apartment and started making something for dinner. After a few hours, he snuck back to the room, seeing her curled up in his bed, his heart swelled. He watched her for a bit, then moved to the bed, sitting beside her he touched her back gently.

"Hey, are you hungry?"

She rolled over, opening her sleepy eyes she stretched, smiling at him.

"What's for dinner?"

He smiled slyly. "Come and find out for yourself."

She followed him out to the kitchen, where a plate of spaghetti and garlic bread awaited, with a salad on the side. She was suddenly famished, and sat to eat with him, praising his skills with Italian cuisine. He was glad to see her bright and energetic, he knew how personally she took each and every call, and it seemed like it was catching up to her, wearing her body down. She caught him staring and gave him a small, nervous smile, and his heart jumped. They were still in the beginning of their relationship, but Casey could see himself falling in love with her. Fast.

Casey and Brett has barely made it into firehouse 51 for shift when Cruz rushed up to them.

"It's a boy. A BOY. I'm going to have a son!" He told them excitedly.

Sylvie's face lit up. "Joe, that's incredible!"

Casey slapped him on the back. "Congratulations."

After changing in the locker rooms, Sylvie headed to the break room for breakfast, where everyone was buzzing with the baby news.

"I told you," Foster shrugged, "Joe is not meant to have daughters."

Stella sighed, "I just love baby's, there so cute and snuggly, I want one," she noted her companions raised eyebrows and added, "Someday, geez."

"With a certain Squad Lieutenant?" Sylvie teased. It was about time they picked on someone besides her.

But Stella gave her a wicked look. "Don't test me, Brett. I know things."

Sylvie swallowed, a concerned look on her face. "Are you blackmailing me?" She half joked.

Stella poked her fork at Sylvie saying dramatically, "You don't want to know what I'm capable of," but her eyes were twinkling.

Sylvie laughed and glanced across the room to where Casey was plating himself some breakfast, and her thoughts wandered. Someday, he was going to be an incredible husband and father. But with who?

"Do you want that?"

She glanced at Hermann, who was suddenly by her side. Had he seen her staring at Casey?

"Wh...what?" She stammered, glancing back at Casey. She most definitely wanted that, but how did Hermann know?

He pointed at her uneaten Hawaiian role, repeating with an odd expression, "do you want that?" And she breathed a sigh of relief, handing it to him as she went back to daydreaming about Casey.

The morning started out slow, Emily and Sylvie were washing ambulance 61 and doing a tire and oil check. Suddenly, the alarms went off for a residential fire, and they were racing off in the rigs. The house was ablaze when they got there, but they could see a woman waving for help in the upstairs window.

"Get that ladder up to the window!" Casey ordered, asking a neighbor, "is there anyone else in there?"

"I... I don't know, Susan lives there with her son and her elderly mother. I didn't see either of them."

Casey headed towards the door, Severide, Mouch and Gallo with him. "Hermann, get that hose ready!" He shouted, busting open the front door. He could see at the back of the house the kitchen was in flames, and they began calling out for victims.

"Fire Department, call out!"

Mouch and Gallo headed towards the living room while Casey and Severide headed upstairs. The fire had already made its way to the second floor, and was blocking access to the back room where the stranded woman was.

"Casey, we've got the ladder truck up to the window," Cruz said in his headset. "Get her out, now," he told them. His instincts were on edge, and although the fire was encroaching on the staircase, he continued upstairs to search the other bedrooms. "Fire Department, call out!" He yelled again, heading down the hallway. Seeing a closed door, he opened it, revealing a bathroom. Huddled in a bathtub full of water was a fully clothed little boy, an elderly unconscious woman was half in the tub, half out, and the shaking child told them through tears, "I can't wake her up!"

Severide grabbed the woman, wetting towels and tying them around her body, he pulled her out of the room while Casey carried the little boy.

Sylvie was outside, checking the mother who had been brought down from the second floor out the window and down the ladder. She had been asleep on the couch when she woke up to the fire, and raced upstairs to look for her son and mother, but ended up trapped in the back bedroom. Her injuries were minimal, just some smoke inhalation and first degree burns, but she was in hysterics worrying about her family, and Sylvie was doing her best to comfort her.

Sylvie heard Casey on the radio saying, "We've got them, we're gonna need some help upstairs!"

And then the roof of the dwelling collapsed.