1. Chapter 1

A/N: So, in all honesty…I have no idea where this came from. I was daydreaming and it occurred to me and I figured 'well why not write a fic on it?'. So, I hope you like this idea!

Enjoy!

NOTE: For the sake of this story, let's say Erin and Jay's One day happened a year and a half ago during 1x06 so that this all makes sense. I've used the episode air date of 1x06 and 2x23 as a bit of a reference for the timeline and Ben's age :)

~Another Broken Heart You've Left Behind~

"Actually I quit" Erin says as she carelessly throws her badge onto the bar.

"And what about Jay? What about Ben?" You can't just leave them" Hank asked.

Erin froze at the mention of the two men. She brought the beer to her lips and took a big chug before shrugging her shoulders.

"They're both better off without me. Look how well being close to me turned out for Nadia." she whispered

Hank opened his mouth to speak but was cut off as Bunny walked up to Erin and put her hands on her daughter's shoulders.

"Hank" Bunny plastered on a smile "This is a sensitive matter, Erin just really needs to be with family right now" Bunny said tauntingly.

Hank could feel the steam coming out of his ears as he looked at the train wreck that was Erin's mother. He wanted to yell. To scream. To tell her that she wasn't Erin's family. That she never had been. But he didn't.

Instead, he picked up her badge of the bar and walked out the door.

"Halstead." Hank sighed into his phone "We've got a problem" he says looking back at the bar from where he sat in his car.

"I'll meet you in 20" Jay said as she gathered his things and headed out of his apartment.

…

Jay walked up the stairs to the intelligence Unit, wiping his eyes tiredly as he entered the office. He walked straight into Hank's office where the man sat staring at Erin's badge.

"So it's true" Jay said "She really gave up on us."

"She's in a dark place Jay" Hank said "She just needs some time."

"And what am I supposed to do?" Jay said as he looked down at the baby that lay on his chest in his carrier.

"I don't know Jay, just look after my grandson. And pray that Erin comes back"

…

Jay smiled as the six-month-old baby snuggled up against his chest. He gently placed him down in his crib and sat on the edge of the bed that he and Erin used to share.

The two partners had gotten together the night of her high school reunion, but both agreed that they would stay professional. Three months later, Erin realised she was pregnant. And that's when things got a bit messy.

They were up-front with Hank, who had been absolutely livid when he found out, but - after much debate, and a black eye for Halstead - he agreed to let both Erin and Jay stay in the unit since they were not pursuing a relationship.

And six months later, Benjamin William Halstead was born. November 10th, 2015. Two weeks before his due date, but perfectly healthy. He had his father's green eyes and his mother's dirty blonde-brown hair. He had the brightest, gummy smile and little button nose. He had the entire unit, including Burgess and Roman, wrapped around his little fingers.

Erin had moved to the task force and she and Jay had started dating. They were content with their little family, and even Voight seemed to turn a blind eye when Erin returned to the unit again. Everything was going well. Until Nadia died.

Erin didn't talk. She grew distant from Voight, Jay and the baby and started coming home late, alcohol covering her breath and clothing. Sometimes she'd come stumbling through the doors. And then a week ago, she just stopped coming home at all. She started crashing at Bunny's house, and at her old apartment since Nadia had leased it out when Erin and Jay moved in together to take care of Ben.

Jay tried to help her, but she just shut him out. She didn't want to see him, or her son. She thought she was protecting them by keeping them out of her life, but all she was doing was breaking their hearts.

Jay was brought out of his thoughts as Ben started to stir slightly. He walked over to the crib and placed his hand on the baby's round tummy, gently rubbing circles as Ben's chubby legs squirmed in content. Jay smiled as he looked at his son's bright and hopeful eyes.

"It's just you and me for a while buddy. Mama's gonna be gone for a little bit" he whispered as his son started to fall back to sleep"I'll get her back though, don't worry. I'll find a way" Jay promised his son as his phone buzzed in his pocket. He checked the screen and saw a message

New case. Bring the kid, we're gonna be here a while.

Voight

A/N: OK! So, again, I'm not 100% sure where this idea came from but it's been stuck in my head for MONTHS and I just wanted to try and write it out and see what became of it. And with the emotional episode last night I felt really inspired to finally finish this chapter.

I named the baby Benjamin William in honour of Ben Corson because last night's episode and the situation Ethan was in with his coach reminded me so much of Ben Corson and Ronnie Lodiger. Anyone else think that or am I just crazy?

Anyways, this story will probably only be five chapters max. I'm not very good at writing multi-chapter stories for CPD. One shots are more my thing, but I wanted to at least attempt it! So I hope you enjoyed this chapter and let me know if you think this is worth continuing. The storyline will be similar in terms of the case in 3x01.

Please leave me a review and Let me know what you think!(Sorry for the long ass Author's Note :P)

Maddie :)