Fishnet stockings were itchy. Foster just scratched and scratched at her thighs as she sat, sipping her beer with Little Red Riding Hood and Cleopatra. She was questioning her choice of costume, suddenly. Wanting to look good was one thing; putting herself through this torture was another.

"Where's Caesar?" Brett asked, pulling Foster from her thoughts and Kidd from her phone.

"He got cold feet," Kidd shrugged, setting her phone down for a second. "I told him he's gonna get cold legs, too, 'cause his ass better get here soon," she smirked.

"He's not feelin' the skirt?" Foster chuckled, imagining Severide's inner turmoil regarding his outfit and reflecting her own.

"Naw, I think he's self-conscious or somethin'," Kidd told them. "But have you seen his thighs… damn…" she trailed off, happily in thought.

Foster and Brett grimaced at each other at the image. Not that he wasn't an attractive guy- he definitely was- but no one wanted to think about the thighs of someone who was essentially their brother. Clearly, Kidd didn't feel that same brotherly love toward him.

"What's up, ladies?" Casey asked, standing at their table suddenly with a new round of drinks in his hands. He was wearing his standard Captain outfit, minus the turnout gear. He looked… just like he did every day.

"You really went all out, didn't you?" Brett chuckled, hearing her flirtatious tone far too late.

"I feel like I have to dress up every day. Didn't feel like doin' it again," he said, though his eyes remained on Brett.

"Kidd told me I couldn't come if I didn't wear a costume," Foster grumbled, looking at her puffy white sleeves and rolling her eyes, watching Casey's gaze settle on the feather in her hat.

"Well I didn't get that memo," he shrugged proudly. "Where are Severide and Upton?" he asked casually, pulling up a seat at the edge of the table next to Brett.

Foster forgot how itchy her legs were for a moment. Of course, he would ask about Severide, but why Upton? So, he'd probably seen them hanging around each other, but why would that imply that she was missing from the group?

"He's uncomfortable with his skirt," Kidd laughed.

Foster remained silent, looking at her phone subconsciously as all eyes were on her.

"Where IS Hailey? Did you figure out what she's wearing yet?" Brett asked, not helping her discomfort.

"She's on her way," Foster said quietly. "And no. No idea," she played off as casually as possible.

"She didn't tell you?" Casey asked, a mischievous twinkle in his eye.

"I think she wanted it to be a surprise," Kidd said, wagging her eyebrows at Foster.

Foster finished her first beer before taking a large swig of her second. It was Halloween, right? Time to let loose. And whatever Hailey was dressed as (if she ever showed up), she had to be mentally prepared. Prepared for what? She wasn't sure. The detective could've shown up as a zombie or Sherlock Holmes and Foster would still have to keep calm, somehow.

As she flipped through her texts, a whooping sound brought Foster back to reality. The crew from the 21st precinct was on their feet, laughing and clapping as…

Hailey. Hailey Upton. Full on black leather suit, red wig Hailey Upton. Black Widow.

Foster's mouth went dry. She had mentioned once that Hailey looked like Scarlett Johannsen, but damn. Her eyes were locked on the woman, who was busy greeting her friends and hadn't seen her yet. Upton looked uncomfortable, insecure, and as much as Foster was drawn to her costume, she hated the nervous energy that was flowing from the detective.

"Hmm-mmm…" Kidd cleared her throat loudly and obviously, drawing Foster's attention to her.

Her eyes were wide, palms sweaty. She glanced at Kidd for just a moment long enough to catch the smirk on her face.

"No wonder she didn't wanna tell you what she was dressing up as…" Brett said, admittedly taken by the costume as well.

"Damn…" Casey said, eyebrows raised, earning a smack in the chest from Kidd that didn't go unnoticed by Foster. "I just meant…" he struggled. "That's a good costume," he shrugged, looking down at the table.

Her pirate costume was sub-par, Foster decided. She wanted to look good. She wanted to wear something that she would never normally wear. But now…

Hailey's attention was drawn across the room to where she expected Foster to be. Their eyes met and shy smiles followed instantly. Foster watched as Upton said something to Ruzek, waving him off before turning to approach their table.

Her mouth was dry again. Upton was close enough to be in speaking range, but no words came out. Foster began to scratch nervously at her thigh, again.

"Daaaaaaaamn…" Kidd almost sang, eyeing Upton unabashedly. "I wouldn't have told Foster what I was bein' either, if I looked like that!"

Upton looked to Foster apprehensively for a mere moment before pulling her eyes back to the others. Casey looked to Brett questioningly, but the woman shrugged it off, not wanting to give in to the gossip that her partner was so wary of.

"You guys look great," Upton smiled, any excuse to pull the attention away from her, taking in Brett in her red cape, Kidd in her Egyptian glory, and Casey… "What're you?" she had to ask with a laugh.

"Hi, I'm Matt Casey," he grinned, shaking her hand goofily.

"I was told costumes were mandatory," Upton rolled her eyes, putting her arm over her waist self-consciously.

The fear, the insecurity in her eyes were too much for Foster to bear. Without thinking, she pulled Upton's hand away from her body, gaining her nervous attention.

"You look amazing," Foster said quietly, not realizing that she was still holding on to Upton's cold hand.

"So do you," Upton whispered, stepping nearer instinctively.

"Naw, this was stupid," Foster shrugged, regarding her outfit. "I thought it would look good but it's mostly just itchy," she admitted.

"Who needs drinks?!" Casey piped up suddenly, looking pointedly into Brett's eyes.

"You just got us drinks—" Stella stopped herself as she saw the look exchanged between the two. "I mean… Upton, what're you drinkin'?" she covered, well.

"Oh, I'll get it," she smiled, glad for the generosity of the group but still uneasy.

"This is your first one of the night, Black Widow," Kidd winked. "We'll fight over who gets the rest later."

"Well then…" Upton couldn't help but look to Foster before she spoke. "I want Whisky."