A/N: Sorry for the delay, lovely readers! I've been working on my personal novel and I'm getting ready to send it out into the land of publishers soon, so I've been a bit busy. But I found some time to update, so enjoy, and please review!

Ivy and Jay were lying on the couch the next morning with a bed sheet twisted around them. She smiled as she woke up and heard him stir. She turned onto her stomach, resting her upper body on his chest so she could see his face.

"Hi," He said as he smiled at her.

"Hi," She smiled back.

"Did you sleep well?" He asked.

"You mean when we finally did sleep?" She laughed.

"I've missed that laugh." He grinned. "I've missed you."

"I've missed you too," She said before she caught a glimpse of the clock and groaned at the time. "I don't want to get up."

He sighed. "We have to, don't we?"

"We have to go to work." She said. "But we have a bit of time."

"Oh really?" He grinned as he kissed her.

They heard talking outside the door and a key in the lock and they scrambled to get up. Jay grabbed his boxers and jeans, throwing them on, and Ivy wrapped the sheet tightly around her, unable to do much else in that moment.

Casey walked in first, stopping as he took in the scene. He dropped his head and grinned slightly as he took a few more steps into the room, letting Severide walk in after him. Severide looked at them as Ivy ran a hand through her hair, a nervous habit of hers.

Severide picked up Jay's shirt from the floor and handed it to him. "I think you should go."

"Kelly," Ivy said.

"It's okay," Jay said as he put his shirt on and leaned over to kiss her before he grabbed his jacket. "I'll see you at work." She nodded and watched him leave before turning a heavy glare on her brother once he was out the door.

Severide just shook his head at her. "What was he doing here?"

"Well, I'm wearing a sheet, so pretty much what is looks like." She said.

"I can see that," He snapped. "My point is why are you going down that road again?"

"Kelly, I'm an adult." She said. "I can make my own choices."

"Because you've done such a great job in the past?"

"What is that supposed to mean?"

"Okay, enough." Casey interrupted before a fight started. "Look, we need your help."

"With what?" She asked.

"Shay's death," Severide said. "We think it was arson."

Ivy hesitated for a moment. She was shocked and confused and she had a million questions to ask, but she knew that they probably didn't have many answers. "Okay," She nodded. "I'll get ready."

Severide watched her disappear into the bathroom before he turned back to Casey and shook his head. "Is it three years ago again?" He asked. "Because it certainly feels like three years ago with those two starting up again."

"Old habits," Casey shrugged. "Look, she had a point. She's an adult, whether you like it or not."

"She's also my sister, man." He said. "And Jay almost got her killed when they weren't working together, what's it going to be like when they are?"

"I don't know, but she's twenty-four, so you can't really tell her to stop seeing him." He said. "Besides, I don't think Antonio is going to let her get that deep again."

"Antonio was supposed to be looking out for her the last time." Severide said. "You know, he came to me when they pulled her out of the academy at twenty-one. He said he needed her for some case in vice, but he'd look out for her. I don't think I'll ever forget the look on his face when he came to tell me she got shot."

"He didn't know,"

"It was his job to know." He said. "And he failed, so I don't really trust any of them now."

"Well, you're going to have to." Casey said. "She's not leaving and we need their help, for Shay."

Severide nodded. "Yeah, for Shay."

OOOOO

Ivy was sitting at her desk with the files from the CFD. She frowned as she looked at the fire that killed Shay, and the profile on Adrian Gish. She looked up when she saw Antonio coming up the stairs. "Did you get a call about this?" She asked as she held up the file.

He nodded. "Gabby called me last night."

"Kelly filled me in this morning and they can't do anything on their end." She said. "Want to go rattle some cages?"

"I'm already ahead of you." He smirked. "I was coming to get you."

She frowned curiously as she followed him into one of the interrogation rooms. She turned and looked through the glass to see Adrian Gish sitting in the room. "How'd you get him here?"

Antonio shrugged. "Force."

"Can we hold him?"

"Not for long." He said. "I already took a run at him and he figured out I was Gabby's brother, but he doesn't know you."

"It's been a while since I interrogated anyone." She said.

"Yeah, but you're pretty good at it." He said. "Who do you want in there with you, Jay?"

"No, she shook her head, too personal. A guy like this, he'd pick up on that." She said.

"What about Atwater?" He said. "Bring in some muscle."

"He'd pick up on that too." She said as she studied him. "Get me Lindsay. Let's see how he does with two women in the room."

Ivy stared through the glass at him until Antonio returned with Lindsay. "What's the plan?" She asked.

"He wants to play the game," Ivy said as she held up a lighter and some files. "So, we're going to play."

Lindsay nodded and grabbed a small garbage can as they went inside. He looked up when they came in and a hint of confusion twinkled in his eyes before a smirk came across his face.

"So, they sent in some pretty women." He said. "Do they think you'll get me to talk?"

Ivy was trying to keep her emotions out of it. This guy had killed Shay, but he wanted to get a rise out of them and she wasn't going to let that happen. Lindsay put the garbage can on the table and Ivy dropped the files beside it.

"Adrian Gish," Ivy said as she flipped the file open. "The CFD likes you."

"They've been after me for years." He said causally. "But they can't prove anything."

"Really?" Lindsay said. "Tell us more."

"Well, the problem with arson is that it destroys the evidence." He said. "It all just burns up in the flames leaving no trace."

"You know, I kind of like fires myself," Ivy said as she looked at Lindsay.

"You do?" She asked, pretending to sound surprised.

"Yeah, there's a certain thrill to watching things burn, especially if you're the one the lit the fuse." She said. "Isn't that right, Adrian?"

He paused as he looked at her. "I wouldn't know."

"Ah, right." She nodded. "Well, I'll show you what I mean."

Lindsay watched him as Ivy pulled out a lighter. She slowly grabbed his picture from the file and lit in on fire above the trash can. She held it up, watching him watch the flames before she dropped it into the garbage can. Then she did it again, and again, and again.

"I know what you're trying to do." He said through gritted teeth. He was uncomfortable and she knew he was the right guy, that he had done this and that he'd do it again.

"Really," Lindsay said. "What are we doing?"

"You're trying to get a reaction out of me." He said as Ivy continued to burn pictures and pieces of paper. She held up one of the photos in front of him as it burned and she waited just long enough for him to lunge at it in anger. "It's not going to work." He snapped.

"I don't think you know me at all, Adrian." Ivy said as she snapped the lighter shut. "But you better believe that we know you."

They left the room to find Voight and Antonio standing outside. Voight nodded at her. "Not bad," He said. "I threw matches at him and didn't get that much of a reaction."

"That's because he likes to watch things burn." She said just as a lawyer stepped in between them.

"Unless you're charging my client with something," He said. "We're leaving."

There wasn't much they could do, they had to let him walk. They started working the case right away. They followed him, they investigated him, they looked into his past, but they kept hitting dead ends when they found out he kept using fake names. But then they got a lead and they finally had him, they just had to find him.

They searched his house and found photos of Gabby and false messages being sent to her to meet at a location. Ivy was in the car with Voight and Antonio as they headed to the location but they couldn't get a hold of Gabby. As she watched Antonio panic frantically, she wondered if this is what Kelly felt and acted like when it was her in trouble.

It was all a blur as they ran into the building. Gabby was stuck in the elevator with the arsonist between the third and fourth floor and Antonio was practically leaping up the stairs as Ivy tried to follow him. Before she could even think or react, Antonio had the doors open and he had taken the shot. For something that felt like it was never going to get solved, it sure ended pretty fast.

Ivy walked back into the station and Platt nodded to her and gestured behind her. Kelly was inside the office waiting for her and she headed over, shutting the door behind her so they could have some privacy. "I heard you got him." He said.

She nodded. "Antonio did, he was going after Gabby."

"Good," He nodded and then smiled weakly. "You know, I was finally getting used to the idea that she died and that it was an accident. It feels different to find out she was actually murdered, and even though he's dead, it doesn't make me feel any better."

"I know." She said. "I'm glad we got him, but it doesn't bring her back."

"Look, about this morning, it's not that I think you can't make good choices." He said. "It's just that you're my little sister and that means I'm always going to be trying to protect you, even when you don't need it."

She smiled. "I watched Antonio almost lose it when he couldn't warn Gabby that she was walking into a trap today." She said. "I know my job probably worries you, especially after what happened, but trust me when I say that I can do this job."

"I know you can, Vee." He said as he wrapped an arm around her and pulled her into his embrace. "But it's not going to stop me from being your big brother."