Don't Leave Me

A/n: Okay, it's safe to get dirty minds now! And I'm purposely not putting much of the investigation in, because this story isn't about the investigation… it's a romance! Also, thanks to those of you who wrote such great reviews for chapter 3! I really appreciate it!

Olivia climbed out of the drivers side of her car. Kaitlyn was still sitting in the passenger's seat, staring out her window. "You do realize that you can't sit here all day, don't you?" Olivia asked.

"You realize that I'm only going to be in the eighth grade, right?" Kaitlyn asked. Olivia nodded. "You also realize that I'm fifteen, two years older than any other kid at this school, right?"

"Yes, Kaitlyn, I realize that. I am your mother, and how old you are is one thing I will never forget," Olivia said. Kaitlyn rolled her eyes and got out of the car, following her mother into the school.

"Hey Olivia!" Lizzie called out, coming over and giving the woman a hug.

"Hey Lizzie. How are you?" Olivia asked.

"Late. I'll talk to you later, okay?" Lizzie asked.

"Sure."

"Who was that?" Kaitlyn asked, after Lizzie had walked away.

"Elliot's daughter, Elizabeth," Olivia told her.

"He has a kid?"

"He has four of them," Olivia replied.

"Someone's been busy."

Olivia stopped in her tracks. "That's wrong."

"What can I say? I'm almost sixteen."

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"What's going on?" Olivia asked, already wearing her bulletproof vest. She'd gotten paged just as she was leaving the school, and now she was in front of an abandoned brownstone, not sure of what was going on.

"Hostage situation. At least four kids inside, possibly more. Guy's got an entire arsenal in there. He hasn't fired yet, but no one's gotten close. We were just serving an order of removal," one of the officers told her.

"Any names?"

"Not yet. All the guy would say is he wasn't going to talk to anyone but you," Elliot said, walking up.

"Did he say why?"

"He refuses to say anything else," Elliot said. One of the upper windows opened, and a head stuck out.

"Hello, Livvy," a saccharinely sweet voice called. She shuddered at the sound. "Won't you come up, so we can have a little chat?"

"Let them go, Nicolai. They didn't do anything," she called to him. He smiled.

"Let them go? Now, Livvy, where's the fun in that? We're having a little party up here, Livvy. Why don't you join us?"

"You can't go up there, Liv. He's got guns," Elliot said, holding her arm. She turned to look at him.

"I don't have a choice, El. I don't go, he might get bored, start killing them," she said. She pulled out her gun and started towards the door. "I'll keep him busy. When he leaves the window, bring in the SWAT team."

"I'm coming with you," he said, pulling out his own gun.

"No, El. You come, and everyone is in more danger. Just do what I said, okay?" she asked. She waited to make sure he would listen before continuing into the building. It was sweltering inside, like the air conditioning hadn't been on for a long time. She could see where the children had been sleeping. There were several dirty cots on the floor of the living room.

Olivia kept her gun up as she ascended the stairs, knowing full well what could happen if he caught her off of her guard. As she reached the top of the stairs, she could see him smiling at her, a gun pointed at the head of a small girl.

"Put the gun down, Nicolai," she said. He smiled.

"I would suggest the same to you, Detective," he said. "Funny. I never pictured you as a detective, Livvy. You were always so weak. Fought back like a girl."

"Don't do this, Nicolai. Just put the gun down, so we can talk," she said, coming into the room. She had to get his line of vision away from the staircase. She walked over to where there were five small children standing in a corner.

"We can talk just like this, I think. Take off that silly vest, Livvy. You won't need that here," he said.

"I can't do that unless you put down the gun, Nico," she said. Out of the corner of her eye, she could see Elliot in the doorway, his gun trained on Nicolai. "We've got you surrounded, Nico. There's no way out of this now. Just put the gun down. It'll be easier for you if you just put the gun down." Nicolai just glared at her and pushed the girl away, raising his gun at Olivia. Elliot watched, as if in slow motion, as he pulled the trigger. Elliot fired his own weapon, but not until after Nico had already fired.