A/N: I'm really enjoying this new, non-canon pairing. I feel like their chemistry would be remarkable, if they were ever to interact more on either show. Let me know if anyone is interested in this story or if I'm just completely out there with it. Criticism and reviews are greatly appreciated. Thanks and I hope you enjoy.

A few days had passed and suddenly it was the eve of Halloween. Foster and Upton had texted and spoken as usual, neither ready to fully admit the definite shift they were feeling in their 'relationship'. They hadn't hung out since that night at Molly's, to which Foster was mentally referring as 'the hug'. She had only taken the expected amount of crap about it from her friends, and life was pretty much normal.

A calm afternoon in the common room had the team anxious and bored. They only had a few hours before they were off shift and time was ticking by slowly. An old football game played quietly from the television that no one seemed to be watching while the women sat at the table, each distracted by their own phones.

"Did ya decide on a costume?" Kidd asked passionlessly, looking up from her phone for a second before turning her eyes down once again.

"Not really," Foster shrugged. "Do I really have to dress up, or can I just come to the party?"

THAT got her friends' attention.

"Are you freakin' kidding me?" Kidd scoffed. "It's Halloween, Foster. YES you have to dress up. And it's tomorrow, so you better figure it out soon."

"Did Hailey decide on anything?" Brett asked, also worn out and dull.

"She says yeah, but she won't tell me what," Foster said flatly, successfully hiding the excitement that she felt about that simple thought.

Brett's eyes lit up instantly.

"Must be something sexy..." she sang out happily.

"Or maybe she just wants to keep it a secret," she argued.

A shuffle from the entrance of the common room caught their attention, and there stood Hailey Upton, seemingly greeting Chief Boden. This girl had a thing with timing.

"Detective Upton, welcome," Boden smiled politely, shaking the woman's hand. "Are you here on business?"

"No Sir, Chief. Just visiting, if that's okay," Upton nodded, slightly uncomfortable with the eyes of all of Fifty-One boring into her.

"Of course, anytime. And please, call me Wallace."

Upton smiled sincerely at the man before allowing her eyes to scan the room. Was it too forward to just walk up to her Foster? Should she make awkward, impersonal small talk with the other members of the house along the way? Maybe she shouldn't have shown up here in the first place...

Brett kicked Foster's shin, hard enough to make her point but a bit harder than entirely necessary. Her wide eyes alerted Foster to action, though she didn't know what action to take.

"Go talk to her!" Brett whisper-yelled through gritted teeth. "She feels out of place."

Foster nodded and quickly stood, smoothing down her uniform shirt before crossing the room to her friend. They smiled immediately and Upton's face reflected the relief that she felt at Foster saving her from her nerves.

"Hi," Foster's smiled was unwavering. "To what to I owe this pleasure?" she asked, instantly chastising herself for her cheesiness.

"I was just in the area," Upton shrugged, leaning against a table out of earshot of the others. "I stopped by that bakery we talked about so I wanted to bring you this," she said, extending a small bag to Foster. "Oatmeal raisin."

Foster's breath caught and heart skipped at the woman's gesture. Of course, she would remember her favourite cookie.

"That's so sweet," she beamed, taking the offered bag and opening it. "Where's yours?" she had to ask, noticing the bag only contained the one cookie.

"Oh, I already ate it," Upton grinned, embarrassed. "Okay, them. I already ate THEM," she added with a chuckle.

"Well, thank you. It means a lot," Foster said, smiling into her blue eyes and leaning nearer naturally. "We can share mine," she offered, taking a bite and melting at the rich, homemade flavour.

"I already ate three chocolate chip. I think I'm good," Upton laughed, giving into the pull and leaning against Foster's side.

"No oatmeal raisin?" Foster questioned, taking in the heat emanating from the detective. "You have to try it," she insisted, breaking off a piece of the cookie and holding it up to Hailey.

They locked eyes for a long moment, getting lost in each other's gaze as though they were alone, as they had avoided for a few weeks. It was getting much harder to deny the electricity. Upton squinted flirtatiously before taking the bite of cookie from Foster's fingers, their eye contact never wavering.

The spark that shot through Foster at the small contact scared her, reminding her of being a teenage kid who had never experienced the feeling before. Upton seemed to be in the same boat, licking the remnant of cookie from her lower lip before blushing furiously. Only then was the bubble broken, Foster recalling that they were sitting in a giant room with all of her work family, each of whom was most likely watching- even if they hid it well. A matching blush covered her own cheekbones as she bumped Hailey's shoulder, looking to the ground shyly.

"Let's take a walk," she breathed out, nervousness audible.

"Good idea," Upton rasped, unable to make eye contact with the other Fifty-One team members as she exited the room.

"Did you choose a costume?" Upton asked quietly as they entered the truck bay, deciding the best plan in the moment was to abruptly change the subject, and the tone.

"I'll tell you what I'm wearing when you tell me what you're wearing," Foster couldn't help but flirt, sitting on the back of the ambo and motioning for Hailey to join her.

"You're a terrible liar," Upton almost giggled, scooting up to sit next to Foster. "You have NO idea what you're wearing."

"Hey!" Foster exclaimed, feigning insult. "How do I know that you didn't lie about it?! You could've just not told me because you're full of crap," she challenged.

"You'll see..." Hailey smiled, bumping Emily's shoulder.

"You could be lying right now..." Foster smirked, looking into Upton's eyes and finding herself leaning into the woman yet again.

"Do you think I'm lying?" Upton asked quietly, raising an eyebrow and causing Foster's breath to catch.

"If you're not, give me a hint..." Foster said, brushing the hair out of Upton's eyes just to see them this closely for the first time.

Upton looked contemplative for a moment before turning to face Foster. She leaned into her, feeling the heat between them as she moved toward Emily's ear.

"You're gonna love it."

XXX