Hey, Luce! Over here," Will called from the bar, sitting on the stool with a drink in his hand. His brunette sister, whom he hadn't seen in person for a few months, spotted him and walked over. She pushed through a few men to get there, giving flirty smiles, and he refrained from rolling his eyes.

She plopped down next to him, gave the bartender a smile too, that was polite, and asked for a beer. Lucy sighed. "Car crash?"

He nodded. "I'm surprised I was even able to get out for a drink even though I'm still on call." He twirled his beer bottle around, cocked her head and looked at his sister. "So, why're you here?"

Lucy feigned being hurt. "What, not happy to see me?"

He gave her an unconvinced look. Suddenly, a loud beeping came from his phone, and he grabbed his jacket after reading the notification. Lucy watched him rush out, leaving his beer behind, with only a small apologetic wave in her direction. She checked her watch- Jay said he'd be there around 8:00, and it was five minutes past.

She took another sip of her drink, and was about to start taking to the girl behind the counter, with the dark hair and light brown skin. She seemed nice.

Someone sat down next to her. "Same as her, Gabby." Jay said, and was handed a cold beer by the girl, who smiled at him in response. "Thanks."

'Gabby' began to move to another customer, all the while wiping he counter with a damp towel.

"Are you going to ask?" Lucy questioned, after a few awkward moments of silence.

Jay acted innocent, glancing over at his fellow officers and shaking his head at their beckoning hands to go join them at their table. "About..."

She rolled her eyes and exasperatedly responded, "About why I'm back."

"Well, since you brought it up-"

"I quit my job."

He cuts his eyes at her. "You did what?" He seemed incredulous; he couldn't believe this. He was partly relived, though. She traveled for her work a lot, went undercover, was assigned to dangerous cases and constantly moving from FBI related things to NCIS and CSI. But he was also feeling guilty. He'd always berated her on how she was the younger one, the baby of the family, that it was their job to look out for her. She was always out there on her own doing something stressful and hard and they weren't around to do that.

But she had loved what she did for a living. Lucy was young and smart, and she was more than good at police work. Voight would like her.

And Jay and Will were happy for her.

Jay lightly slammed the bottom of his beer on the counter. "This seems to be a Halstead pattern. First Will, now you. Am I next?"

She looked nonchalant, like it was nothing, but he knew that she was obviously hiding the real reason behind what caused this sudden change. "I just...wanted to start a bit more fresh, y'know?"

"Uh huh." he said, and it didn't take a genius to see he was definitely not convinced. "Does Will know?"

"Not really." She smiled. "By the way, I took the guest room."

"Am I going to find empty chip bags and a shortage of food in my fridge when I get home?"

"Eh."

They held each other's gazes for a while, and the staring contest went on for a few seconds past a minute. Someone snapped their fingers in the middle of their faces and unfortunately for Lucy, she blinked first. Jay pumped his fist with a smirk. "Just a minute, Erin," he said, turning to look up at his partner, and then going back to staring at his sister. "Now you have to tell me one truth."

"Fine." Lucy grumbled, averting his eyes. It was a family thing- whoever lost the staring contest had to answer one question honestly. Jay almost always won. She only beat him when he was tired and annoyed.

"Why'd you come back? And are you staying for good, this time?" Jay asked, making it sound a bit like an interrogation.

Erin watched, almost amused, and still with the intention on getting some baby stories from the little sister she didn't know existed. Lucy seemed interesting. As soon as she'd spotted her walking into the intelligence unit, she had this deep down feeling of dread. If this girl was here for Jay, were they an item? It wouldn't be hard to believe. She was kind of...well, she wasn't ugly, and she had boobs. Usually, on any man, boobs worked. And then she saw the way they interacted, the way they argued- it was obvious that the two were family. She had no clue that her partner had a sister and a brother.

"That's two questions-"

"The second is mandatory-"

"I will-"

"Kill me? Sure."

Lucy huffed defiantly. "Jeez, fine. But let the record show that I know hundreds of creative ways to hide a body without anyone ever being able to prove I was the culprit."

"Okay, now answer the question, sis."

She rolled her eyes, but answered. "I got all up in someone's business while undercover and-"

"That's vague."

"Jesus Christ, Jay, fine." She took a large swig of beer, gulped it down, letting it go down roughly with a slight burning sensation blooming in her stomach. She whipped her head back towards him, her brown hair flipping to the side and falling down her back again. "You remember the techie guy, Christopher? Well, Chris got this Intel. I was back in forensics, and the Intel said that they needed a girl who was experienced to help out with this investigation. It seemed simple. It was all the same mumbo-jumbo about, like, possible criminals in some area."

She nodded a thanks at the man who gave her a second beer, taking another gulp.

"And?" Jay asked.

"I got shot." she said, straight faced.

His expression went slack. "You- you- what?"

The younger one began giggling and said in between each breath, "Kidding, kidding."

Jay clenched his jaw. "Continue the damn story, Lucia-Marie Halstead, and don't ever do that to me again."

"Sheesh, fine, chill." She rolled her eyes. "Anyway, I offered myself up with the gold crested resume and honours and all that stuff, and they almost immediately gave me the job. It was weird, which I should've known, but... I took it. I was tired of being cooped up in a lab with people who complained about police officers and FBI agents constantly demanding new evidence when they knew almost nothing about what they- well, sometimes me- do. So Chris hooked me up with some cool new X-23 wires, I hid them in my bra and had a spare in the lenses of my glasses, and I went in. Next thing I know, there's a girl bleeding out in front of me, and I've got a gun to my head, and the only thing I can think about is how I could die in Hollywood and not have seen my family or said goodbye in four months."

Her big brother tried to take this in stride.

It didn't work. "That is not the full story, Lucy, and what the hell happened during your undercover time?"

She grimaced, remembering something she wanted to forget, and said, "I came back because I want to stay in one place, Jay, and I can't keep moving around and about and not seeing my family for months on end, okay? I missed you guys."

And so he smiled, took his beer in one hand and her arm in the other, dragging her towards where Erin and the others were sitting.

"Guys, I believe you've already met my sister Lucia-Marie. She's going to be staying in Chicago for a while."