Hello everyone! Thank you very much for the support with the last fic, much appreciated! Here's another fluff fic I've been working on. A look into the future on how Brettsey will get together. Hope you enjoy it!

Disclaimer: Anything familiar and its characters belong to Dick Wolf + NBC

It started with the damn yoga pants. Okay, well it wasn't really the yoga pants but damn it helped a lot.

Matt Casey stopped cold in his tracks as his heart palpitated seeing Sylvie Brett in the living room. Not just in the living room, but doing yoga in the living room. As she went from tabletop position to downward dog, heat pooled low in his belly, blood rushing south and his eyes widened. Her ass was just so round and perfect in whatever pants she was wearing. It just fit her curves and everything so… So perfectly.

He audibly gulped before looking up to realise Sylvie was smirking at him, now in warrior pose.

"Hey Casey, can I help you?"

He blushed at being caught. "Uh, uh… No, no, no. Just interesting positions you have going there."

"Yep, I've been doing yoga at home for sometime, it helps with stretching, relaxing and the mind. You don't mind if I do it here do you? I've been doing it while you weren't here." Sylvie replied, a glint in her eye.

Casey had taken the last bedroom that Foster and Brett had since Cruz vacated it when he moved in with Chloe post wedding. He wanted to get out of Stella and Severide's hair, not intending on intruding on their personal space anymore. They had been wanting more and more time alone, especially with Severide's OFI move, and back. Though Severide wasn't happy with his best friend moving out, he understood when Casey explained himself.

It's only been a month since the move, but Casey had settled in nicely, both Foster and Brett having made whatever accommodations they needed. It was of course a little strange to be living with the captain of 51, but they soon realise that Casey was just another housemate who would pay the bills and occasionally cook.

Casey did a good job at separating his professional life with his life at home, and he was getting better at letting loose and being more relaxed around both his housemates. Well, more Foster than Brett considering he was already quite close with Brett, closer than what normal friends really should be.

Casey shook his head to clear it. He really needed to get this straight and compartmentalise his feelings accordingly. The fact that Brett had now gone back into downward dog in front of him, with her ass waving tantalisingly in front of him, did not help matters. He looked back up to see Sylvie staring at him again, with raised eyebrows.

"Uh, no. Don't mind at all. Just a little surprised when I walked in. Foster here?"

"Nah, she's out for the day, meeting with friends. She'll meet us at 51 when we start shift tonight." Sylvie replied.

Matt absentmindedly nodded but still stood there. Sylvie stood out of her position and faced him, a questioning look on her face. "Um, do you need help with something?"

"No. No… No. No. Uh, hah. No. Your pants are very nice. Where'd you get them from?" Casey mentally slapped himself. "Your pants are nice? Get it together Casey." He chastised himself silently.

Sylvie nodded slowly. "Uh, Lululemon has a lot of nice yoga pants."

"Oh, right. Of course. Yes Lululemon." Casey paused. "My niece's birthday is coming up, just thought I'd ask." He fibbed, randomly making up a lie to avert her suspicions.

Sylvie brightened at his lie, "Oh. Let me know if you are going to shop for her! I can give some great feedback."

Casey's eyes widened at being called out, though Sylvie didn't realise it. "Sure, we can go later today."

Sylvie nodded enthusiastically. "Let me know what time you're ready to go. I'd like to shop for some stuff too so that'd be great."

Casey nodded before walking away. He physically slapped his forehead when he got into the room. It seemed that all he was doing lately was nodding like an idiot when Sylvie spoke to him. He groaned and dropped onto the bed. Now he was roped into going shopping for something he didn't need to, with the girl of his dreams. His only hope was that she didn't ask him for fashion advice, because he didn't think he'd be able to take anymore.

Sylvie smirked and chuckled silently to herself when Matt left the living room. Packing up her yoga mat, she headed for the kitchen to make a cup of coffee. Sitting at the island, a laugh bubbled out of her when she thought back to Matt's expression after he saw her in downward dog.

Now that she was well and truly clear of her feelings for him, she decided to play a bit of a game to understand his feelings better. Of course it was risky, but a little harmless fun wasn't going to hurt anyone. Considering they were also at home, not in a working environment, Casey couldn't chastise her for any wrongdoings. Luckily for her, he was able to separate personal and professional quite well, so the last week or so of teasing hadn't seen any faults come her way.

Matt was also responding exactly as she had hoped. The fact that she was doing yoga in her living room was definitely not unheard of. In fact, Emily often joined her. However, doing yoga whilst knowing Matt was going to walk out at any second was definitely planned. Of course she went into downward dog when she knew he was behind her. Sylvie was having way too much fun, and if she wasn't careful, she might get caught.

"Though that might not be too bad," Sylvie mused, her imagination suddenly running wild with the possibilities of Matt punishing her. She shook her head. She has it bad and while she knows Matt has clearly moved on from Dawson (because Stella had told her as much), Sylvie still needed to be careful or she might scare him off. Gabby and herself hadn't spoken or even exchanged so much as a text in years, and apart from the one visit Gabby made recently, she couldn't say that her and Gabby were still best friends. Of course part of her felt guilty for liking Matt, after all Gabby and him were married at one point, but Sylvie felt like Gabby didn't really have a claim to him at all. The divorce made that abundantly clear.

Sylvie finished up her coffee and walked off to get changed. There was an exciting shopping adventure that lies ahead she needed to get ready for, and she wasn't talking about the fact that she got to buy clothes.

Three hours later saw Casey and Brett hopping out of his truck, and walking towards Lululemon. They had decided beforehand that they would shop for his present, then eat, before heading straight to work.

"So Casey what did you have in mind for Violet? Is she into yoga, normal workout, Pilates…?" Sylvie questioned.

"Um, yeah I don't really know. She's super into the whole fitness thing though, so it could be anything." Matt replied.

"Hmmm… Okay. Yeah, the whole fitness thing is definitely going around the younger generation. So it makes sense." Sylvie practically skipping ahead of him into the store.

Matt just chuckled and followed her. Sylvie had already reached a rack and started pulling out different outfits for him to see. "What size is she Matt?" It warmed his heart having heard his first name roll off her lips.

"I think size 2." Casey was thankful that he had purchased clothes for Christmas for Violet and knew her size.

Sylvie nodded thoughtfully and started to recommend different fabrics and types of workout wear to buy for Violet. Of course this was a completely bogus shopping trip that they were on, considering Matt didn't need anything for Violet. But he accepted her advice and ended up with a pair or align tights for his niece.

"Great! So now that you're all squared away, I'm going to browse for some stuff for me, is that okay?"

Casey nodded, "Of course, you just did me this huge solid. So I'll return the favour any way I can."

"Awesome, then you wouldn't mind if I tried some stuff on then?" A teasing glint in her eye. She was going to have a lot of fun with this.

Sylvie started to grab outfits for the dressing room, piling them on top of Matt's arms. To anyone looking from the outside, he was an unwilling boyfriend, shopping with his girlfriend, and right now, that's how he felt. Though, he didn't really mind considering Sylvie was placing bras on top of the pile as well. He shook his head, he really needed to get his mind out of the gutter.

When Sylvie was placed in a dressing room, he took a seat opposite and began to fiddle around with his phone. His score on Crossy Road was ruined when another man plopped onto the seat next to him.

"Ugh, this is shop number 35 for us." The guy grumbled. Matt smiled politely, and continued on his phone before his attention was turned again. "What room is your girlfriend in?"

"Uh, what?"

"Girlfriend? Sorry, I'm assuming, considering this is Lululemon and you're waiting outside the dressing room too."

Matt gestured over to the room Sylvie was in, not correcting the man. "We're just here for this shop and we have to get going."

The man scoffed, "It's what they all say man. Wait till you're here for another 3 and a half hours and lugging around shopping bags. Laura told me a few shops too." The man gestured to the room marked 'Laura' on it.

Matt smiled politely. Luckily for him, Laura had exited the dressing room a few minutes later and the man left. While he was fine with small talk and polite conversation, he was getting a little annoyed. He was also a little weirded out at himself considering he didn't bother correcting the guy when he mentioned Sylvie as his girlfriend. A feminine voice pulled him out of his reverie.

"Hey Casey, I need to ask how this looks, I'm not super sure of this outfit."

Matt's jaw dropped open as his eyes shamelessly travelled up and down Sylvie's body. "It looks great." His voice broke and sounded small, sounding not at all like himself.

Sylvie megawatt smile had his insides melting like a girl's. She closed the door to her room to change out. Matt Casey picked his jaw off the floor and leaned back into the wall. This girl was going to the death of him.

Alright done! I hope you enjoyed this chapter, and definitely didn't think it would be this long! I've decided to write Sylvie a little OOC, although she can definitely rock the teasing look as we've seen on the show before. I like it though because I like Sylvie being all that confident sassy girl.

Let me know what you think! Especially of how I've written Sylvie!