Recognition for this prompt goes to thesuperiorshipper: "I don't know if you do sequels to one-shots, but you should do a second part to this story [Chapter 6] because I loved it so much!"

**Just In Case**

Being on desk duty was just as tiring as being in the field. Erin's now eight month old pregnant belly prevented her from being able to do a lot of things she normally did on her own. While she may not have liked sitting behind a desk for hours a day, she understood it needed to happen in order to protect herself and her baby. She just hated being alone while everyone else was out on the field.

When the unit found out about her and Halstead's secret relationship they weren't surprised. Dawson called it and Atwater apparently owed Ruzek money off of a bet they made involving she and Jay. They weren't worried about their reaction…they were just nervous about Voight's. Hank Voight was pissed. He immediately suspended both Erin and Jay. While Jay's relationship with Voight was strictly professional, hers occasionally drifted into the personal aspect. He was disappointed in her. She did not listen him. She didn't follow the rules he constantly reminded her of. Erin was a little disappointed in herself.

It took two weeks for Voight to cool off and when he did, he paid a visit to Erin's apartment. Every fiber of his being struggled to remain calm as he watched Halstead smugly sit on the couch. He should have known the man who knocked Erin up was going to be at her place. That night Lindsey was utterly terrified. She knew either her or Halstead was getting transferred to another precinct. Voight never backed down from a warning, and he gave her plenty of them, but when the outcome didn't result in a transfer, both Halstead and Lindsey were speechless. Erin was able to stay in Intelligence and so was Jay.

Surprisingly Hank Voight allowed for both detectives to stay. While he hates the dynamic and risks that romantic relationships caused, he valued both of them. They each brought a different aspect to the team, he didn't want to lose either of them. He may have given them a pass on forming a relationship, but the pass was followed by a serious warning. He may have disliked personal work relationships, but he hated the breakups even more. The atmosphere of a personal relationship was bearable and he could tolerate it as long as the affection and problems are left at the door, but a break up always formed tension in the air. He refused to allow his unit to be edgy and tense. Whatever issues they may go through, they had to work out. He refused to tolerate his division to fall awkward to a relationship break up. However, if they do happen to breakup, then someone had to leave Intelligence…and this time he absolutely meant it.

Erin finished organizing the stack of portfolios on her desk. A lot of things have changed the past few months. They purchased a townhouse together and moved in when Erin reached six months. She decided to have the baby at home prompting Laura to offer up the role as midwife. As a result, her and Laura's friendship grew greatly. Burgess and Annie decorated and designed the nursery. Dawson and Olinsky had baby-proofed the house. And despite Voight's earlier reservations about everything, he soon came around and he's excited about a baby joining the family.
"Erin," a familiar voice hollered as he reached the top stair, "Guess whose back?"

Erin's face fell as the voice registered in her head. She immediately knew who the intruding voice belonged to. Her eyes fell to the calendar on her desk as her mind calculated the dates. Time completely flies when you're not paying attention.
"Yes, it's been a year!" He tosses his bag to the ground, "I came to see you. I miss you Erin."
"The feeling isn't mutual."

The smile on Charlie's face fell just as Erin's did earlier. He thought she would have been happy to see him. Charlie agreed to stay quiet for her. He deserved her friendship. And while he did threaten to spill their huge secret, in the end he didn't and as much time has passed she should have forgiven him. It's been a year and he was released from jail today. She was the first person he wanted to see. That should mean something.
He leaned against the stair railing, "Aw, don't be like that."
"We don't need contact," She leaned against her elbows on her desk, "I understand that you're going to be in Annie's life, at least until your son is 18, but that doesn't require you to be in mine."
"Erin, we're friends. We've been through so much together. We have so many memories!" Charlie pleaded.
"None of those memories are good!" Erin rose from her seat, "Charlie-"
"You're pregnant," his eyes fall to her round tummy.

Out of maternal instinct, her hands rest upon it, "Yeah, it's a boy."
"Who-," Before he could finish the sentence, his brown eyes fall towards the photo framed on Lindsey's work desk. The picture was of Erin and Jay. His arms were wrapped protectively and possessively around her waist, "your partner!" An exasperated laugh fell out of his mouth, "I shouldn't be surprised! The way he was looking at you!"
"You have a son! He should have been the first person you visited," she casually stepped closer to him.
The older man crossed his arms and pouted, "Were you going to tell me?"
"You didn't deserve to know."

Anger flashed through Charlie's eyes as he tossed her picture frame to the floor. The front shattered into small pieces and cascaded around the unit's ground. Erin nervously stepped back as Charlie struggled to calm himself down. Charlie hated change and everything around him was changing.
"What are you doing," she whispered.
"This wasn't how we were all supposed to end up! Just in case you forgot, you and Annie are…" his voice falls low and fragile, "mine."
"I don't belong to anyone."
"That's not what I meant," he sighed, stepping towards her while his eyes remained focused on her protruding belly, "you're pregnant."
"How many times are you going to say that?"
"Until I believe it…What did Annie say?" He questioned.
"She was happy for me. She threw my baby shower and helped my co-worker decorate my nursery. She loves my baby just as much as I do."

Charlie ran his hand down his wrinkled face. He may have been older, by almost ten years, but the feelings he felt for Annie and Erin were real. Charlie assumed by remaining quiet about the murder that when he came out things would change for the better.
His head shook sadly, "you can't be pregnant."
"I am." She nodded. Charlie sighed.

His eyes flash down at the cracked picture frame of the happy couple. It wasn't fair. He was forced to leave town while Annie played mom to his son. He was made to go back to prison while Erin and Annie got to live free. Erin is having a baby of her own and she will be able to experience things with her son that he wasn't able to do with his.
"Let my wrist go," Charlie snaps out of his daze and notices his hand wrapped tightly around Erin's wrist. Her response pushed him to tighten his hold. He was angry. His son is a teenager and he didn't even know. Charlie never even knew his son existed until last year.
"You're hurting me," Erin struggled to pull her arm out of Charlie's hold, but his grip wouldn't give. All of the years knowing him, she could read him like a book. While he may have been angry before, now, he just looks hurt.
"Stop."

Laughter is heard approaching which drowns out Erin's latest plea. She continuously struggled to tear her arm from the confinements of Charlie's control.
"Erin you should have saw Atwater! He's badass," Halstead laughed, high-fiving the burly detective, "Man, I wish-" The sight of Charlie cuts him off which forces the remainder of the team to look up to see what captured Jay's attention, "What are you doing here?"
Charlie releases Erin's wrist, "I'm out of jail."
"That still doesn't explain why you're here." Olinsky cut him off.
"In my precinct," Voight adds.
"I came to see Erin."

Dawson notices the discomfort on Lindsey's face. He maneuvers himself between Halstead and Ruzek as he approaches the vulnerable pregnant woman, "Are you alright?" he lifts her hand and inspects it with his eyes.
"Yeah," she pulls her hand away, "I'm fine."
Jay paid no attention to Erin and Antonio's conversation. He and Voight were more focused on Charlie and his presence in the precinct. Halstead stepped around his boss and approached the ex-convict, "Why?"
"What do you mean why?!" Charlie grew heated like once before. He pointed at Erin and smiled, "That's my Erin. I've known her longer and better than any of you!"
"Want to bet?" Voight challenged. Charlie takes a deep breath.
"We're old friends. Can't a guy see his old friend?"
Olinsky pulled the unsuspecting fellow away from Erin and towards him, Voight and Halstead, "Not when the guy is you."
"I think I should go," he pushed Alvin's hand away from him.
"Yeah," Jay nods, "I think you should."

Charlie's hands twitch desperately at his side. He just came to talk to Erin, but her crew bombarded their reunion. He knew he wouldn't be able to finish what he started. He wanted to finish catching up, but with her co-workers eyeing him like he was a plague, Charlie knew that wasn't going to happen. Therefore causing him to slowly face her, "Do you still live at the same place?"
"No, she lives with me." Halstead answered before Erin had the chance. Charlie sighs in frustration.
"Erin I'm going to go. I'll just…see you later."
"No," Olinsky sets his hand on Charlie's shoulder, "I don't think you will."
"How are you going to stop me?"
Olinsky smirked, "Who said I will?"
"Hey Charles," Voight cleared his throat and waved the guy over.
"Yeah?"
"Remember that deal I made with you years ago?"
Charlie's eyes flash to Erin, "If I stay away from Erin, you'll stay away from me."
"Yeah that one."
"What about it?" Charlie shrugged, "That ended last year."
"Well I'm renewing it."
"You can't-"
Voight patted him on the back, "Stay away from her or I'll be coming after you."