Final chapter for this story! Please let me know what you think!

3.

The two partners were back on the job and everything seemed to be back to normal. They were focused on work and spent their time going over case files, doing interviews and searching for witnesses to the crimes they were investigating. Nick was trying not to get distracted whenever Olivia was close enough to him that he could smell her shampoo or perfume. It had been almost two weeks since they had fucked, twice, and he wondered if she even thought about it anymore.

He had felt possessive of her the second time and he knew it was because of Cassidy. He hated the guy. He knew Olivia had been on lots of dates and she had probably let a lot of men touch her but this guy pushed his buttons. He didn't want him anywhere near her. She was his partner. His friend. His … Nick sighed. He shouldn't finish that sentence. Olivia would not appreciate it. She was her own woman and they hadn't made any promises to each other.

And then, the idiot was back.

Brian Cassidy came strutting into the squad room as if he owned the place, and headed straight for Olivia's desk. Nick was standing next to the coffee pot and watched Olivia's face for her reaction to her ex-lover's presence. He saw her force a smile and had to suppress a grin. She wasn't thrilled to see the detective again so that was a win.

But the guy chatted her up anyway and after a few moments, she was laughing at something he'd said. Nick absolutely loved Olivia's laugh but he didn't want her to laugh with that guy. He quickly finished pouring the coffee and took the two mugs back to their adjoined desks. He stepped between Brian and Olivia to hand her her mug and caught her raising an eyebrow.

"What, no coffee for me?" Brian asked innocently, clearly hoping to get Olivia to laugh again.

But Olivia was watching her partner as he stepped around Brian to sit down in his own chair. What was up with him? She thought things had been good between them these past two weeks. He hadn't acted weird around her at all and she now thought that she must have imagined his possessiveness back then.

"You remember where the pot is, don't you Bri?" she asked her ex and former coworker and he gave her a shit-eating grin before walking over to get himself some coffee.

"You really know how to make a guy feel at home," Nick mumbled from across their desks and she fixed her gaze on his black curls. She couldn't see his face because he seemed to be engrossed in the file on his desk. He seemed tense though, and she couldn't help wondering if it was because Brian was back. She was tempted to test the waters a bit, and when Brian returned, coffee in hand, and perched himself on her desk, she ran with the idea.

"So. When are you getting out of here?" Brian asked.

Olivia saw Nick glance up but quickly look back down at his file when he saw her looking at him. He was definitely listening to their every word.

"Why do you ask, Bri?" she asked the man on her desk sweetly. "Are you thinking of taking us somewhere?"

"Not both of you," Brian said, equally sweetly. "Just you babe."

Nick was biting the inside of his cheek, forcing himself not to say anything. How dare he call her that though! Olivia Benson wasn't a 'babe'. Well, she was, but not the way Cassidy said it.

"What did you have in mind?" he heard Olivia ask.

"Well, we could go back to that place where we got plastered once. You know, for old times sake?"

The innuendo was dripping from Cassidy's words and Nick was boiling inside.

"You want to go down memory late and reenact the entire night?" Olivia said, and from the tone of her voice, Nick knew they were alluding to the one-night stand they'd had.

"That would be amazing," Cassidy admitted and Nick suspected that the prick was already getting hard at the thought. He knew the feeling but he couldn't stomach the thought of this man touching Olivia again after … after he had had her.

"Well, why don't we all go? We deserve a little break after clearing so much of our caseload."

Fin and Amanda were just coming into the squad room and heard the last part of Olivia's remarks.

"That we do!" Fin confirmed. "So where we goin' after five Liv?"

"We were thinking our old place," Cassidy chimed in and Olivia bit her lip when she saw Nick stand up abruptly. He grabbed a case file and walked off without looking back, heading straight for Cragen's office.

"What's with him?" Amanda asked but Fin put a hand on his partner's arm.

"He probably found an error in the paperwork. You know how he's always on top of the details."

Fin gave Olivia a pointed look and she knew that he knew more than he was letting on. He had always been the quiet, observant one.

"Well, I'm done with details for the day," John Munch announced as he entered the room. "I filed everything away neatly and I think I'm up for a drink now."

"We were just talking about going out for drinks," Brian told his former partner.

Olivia stood up and moved around Brian and away from her desk.

"Yeah. We're just waiting for Nick. He's in with Cragen."

She knew Brian was a little disappointed that it wouldn't be just the two of them, but she really didn't feel like reliving her one-night stand with him. The sex had been great but she didn't want it with Cassidy. Maybe a few weeks ago she might have agreed, simply because she'd been starving for some action between the sheets, but not now. Her mind went elsewhere when she thought of having sex these days, and the subject of her thoughts was just returning to his desk. He did wear those dress pants well …

"Alright. Let's just all put our files away and get outta here before Cragen hits us with a fresh case," Amanda said, walking over to her own desk to check her drawers.

They all got ready to leave and then the entire group froze when Cragen came out of his office. It couldn't be …

"Starting the weekend early?" their boss asked, nodding at Cassidy by way of greeting.

"I thought I'd steal them away for a drink, sir. Hope you don't mind?" Cassidy said with a disarming smile.

"Not at all. Have a nice evening, everyone. Fin, Rollins, you're on call tomorrow right?"

"How could we forget," Fin said with a smirk. "I'll make sure we get enough sleep, Cap. Don't worry about it."

"Good man. And you two, Benson and Amaro. Sunday morning, bright and early."

"Got it sir," Nick said.

"Looks like you'll be stuck with me, partner," Munch said happily, clapping Brian on the back. "Just like old times."

They made smalltalk as they walked to the elevators, and Nick heard Brian tell Munch,

"I'm hoping Liv will stay longer too. She's not on call tomorrow."

Nick took a deep breath, trying to keep himself calm. Olivia sidled up next to him and bumped his shoulder with her own. He wasn't sure if it was intentional or not, but the brief contact helped him relax a little. She was his partner. His friend. His … lover? No. They had agreed that is was just physical. It didn't mean anything. They had just blown off some steam with someone familiar. Nothing more. Still, he was glad she was walking next to him. Until she wasn't.

Brian Cassidy made sure he was standing next to Olivia on the elevator ride down. Well, not just next to her, but practically pressed up against her. Nick felt his anger bubble up again and almost pushed Cassidy aside when they all exited the elevator on the ground floor.

Olivia had noticed his mood and watched her partner walk ahead of their little group. He was the first to cross the street and didn't even look to see if they were all following him. Amanda and Fin had to dodge a cab and Brian took Olivia's arm when they made a run for it together. They laughed when they arrived on the sidewalk but that only seemed to fuel Nick's mood more.

Olivia watched him walk and she couldn't help herself. She looked at his ass. The man did have a fine ass. And this brooding thing he was doing was actually a turn-on. Her mind started to wander and she thought of the rest of Nick's amazing body. She usually wasn't big on too much hair on a man but he wore his black short-and-curlies very well. She actually liked how it tickled her when he pushed into her and the way he filled her up was so incredible. His cock was perfect for her, long enough and so thick that he could make her …

"Liv? You with me?"

Olivia blinked and looked at Brian with wide eyes.

"Yeah. Of course," she said quickly.

She had to look away, afraid that Brian would notice she'd been daydreaming about her partner's cock. She tried to remember Brian's instead but found that she couldn't get Nick off her mind now. She'd really like to jump him again later tonight. If he still wanted to, that is. She wasn't sure about him in his current mood.

When they arrived at the bar, Brian offered to get the first round since he'd dragged them all along, and they scooted into a U-shaped booth. Nick sat down first and Fin guided Munch and Amanda to the other end of the U so she could slide in next to Nick. Now she was sure Fin knew what was going on. She was going to end up sitting between Nick and Brian and she took a deep breath.

Brian was back quickly with their drinks, proudly setting down a tray in the middle of the table.

"Help yourselves guys. And ladies."

Amanda smirked and grabbed one of the six beers on the tray. The others followed and soon they were all chatting leisurely about work and their plans for the weekend, if any.

Nick kept an eye on Olivia without making it too obvious. He had a feeling Fin was helping him out a bit, redirecting the conversation whenever Nick had missed something and didn't know how to respond. And that had everything to do with Brian effin' Cassidy.

The guy was all over Olivia. Not literally - yet - but he was laying it on so thick that none of the others dared to talk to them. They were in their own little world and Olivia didn't seem to mind at all. Nick's blood was boiling once again but he couldn't do very much about anything.

"Yo Cassidy!" Fin suddenly hollered, making both Cassidy and Olivia look at him. "How 'bout you share Olivia with the rest of us, huh? We all love her, not just you."

Nick wanted to kiss Fin for that. Cassidy just smirked and then leaned in to kiss Olivia softly on the cheek. Olivia smiled and turned to face the group again while tucking a stray strand of hair behind her ear. A clear sign of nervousness, Nick knew. But before he could say anything, he suddenly felt her hand on his thigh underneath the table. She wasn't looking at him but he suddenly felt a lot better.

Fin was keeping the conversation going, asking Cassidy about a certain undercover job and Nick carefully placed his hand over Olivia's on his thigh. Olivia barely reacted but he could see it. It was in her eyes.

Olivia knew Nick was jealous and it actually turned her on. Big time. So much in fact, that she wouldn't mind leaving right now and do something about it. But what would that mean? Were they going to keep having sex together? Would they be exclusive or not? She wasn't sure what Nick would want. All she knew right now was, that she wanted him. Again. She wanted him to use his incredible mouth on her again and to make her see stars like only he could. Her mind drifted back to two weeks ago when they had snuck into a small office in a bar. She didn't want that this time. She wanted to be able to scream and to take her time with him. To explore him further instead of having a quick fuck to relieve some tension. Could it be that … she wanted him?

Nick was watching Olivia's face and he could see her mulling something over. She must have noticed that something was up with him. How would she react if he told her he was insanely jealous of another guy wanting to get in her pants? What would that do to their partnership? She'd probably never fuck him again and maybe even ask for a new partner, both of which would be horrible. Because he wanted to remain her partner and yes, he did want to fuck her again. She was simply amazing and he couldn't forget about what it had felt like to be inside her luscious body. To have her writhe in his lap, to taste her amazing body and fuck her senseless on the couch; or to pound into her from behind …

He felt himself getting hard once again and tried to relax and focus on the conversation at hand. Cassidy was telling them all about some dumb thing that happened to him once and the others were all laughing at the idiot's lame jokes. Nick just wanted to get out of there and take Olivia home with him.

Her hand had drifted up his thigh and she was now pushing her fingers between his legs to stroke him. His head told him to stop her but his body didn't comply. He let his legs drop open a little further and bit the inside of his cheek when she cupped his package and squeezed. His cock was trying to jump but it couldn't inside his pants and boxer briefs. She really had to stop but when she didn't stop rubbing him slowly - all the while looking very innocently at Amanda who was now telling a silly story - he decided two could play this game. He only heard a very soft grunt when he moved his hand swiftly between her thighs and applied some pressure on the seam of her slacks. They needed to get out of here but how?

After a minute, the both retracted their hands but their messages had been sent and received. They sat through exactly three more rounds of drinks before Fin and Amanda announced they were calling it a night. Brian had been trying to get Olivia's attention again but by some miracle, Munch was now sitting between him and her and was pointing out another attractive brunette to him, suggesting they go talk to her. It was obvious that Brian would rather stay with her but Munch got him to get up anyway, and while the two men were chatting with the brunette and her friends, Nick and Olivia jumped up and snuck out.

They were laughing out loud by the time there were outside and half a block away from the bar and Nick suddenly wrapped his arms around her.

"Your place or mine," he growled.

"Mine's closer," Olivia said breathlessly. "And for what it's worth, jealousy is a huge turn-on for me."

Nick kissed her hard, relief flooding his system at his words. When they broke apart he admitted,

"I thought you'd be mad. I mean … it's not like I have any rights here."

"No. You don't. But you're the best dick I've ever had Nick. Why would I settle for less when I can have you again?"

He was grinning so wide he thought his face would split, and they sprinted off in the direction of Olivia's apartment.

It didn't take them long to get upstairs and in her bedroom. She wanted to do it on a proper bed this time and Nick was all in. They tugged at each others' clothes while kissing each other and when they were finally out of their shirts and pants, they stood next to the bed and looked at each other.

"Wanna slow it down a bit?" Nick asked, and Olivia felt her body respond to his question.

"Yeah," she sighed. "I wanna get to know your body better."

Nick moaned and kissed her deeply again, his hard cock pressing against her abdomen through his boxer briefs. Olivia let her hands roam his body and Nick dropped his mouth to her shoulder. He lowered her onto the bed slowly and Olivia moved with him until she was on her back. When Nick reached for her panties, she lifted her hips off the mattress so he could take them off. He groaned when he saw her perfect pussy, waxed and smooth, and when Olivia opened her legs for him, he moved fast, kneeling between her legs to taste her again.

Olivia arched her back and grabbed his curly hair with both hands.

"Oh Nick," she croaked, and his name on her lips was music to his ears.

He lavished her hot core with attention from his tongue, lips, teeth and fingers until she was squirming and panting but he didn't make her come just yet.

Olivia was throbbing inside and she could hardly wait to feel him pounding into her again. Suddenly, Nick moved his mouth to her breasts, pulling her bra down to suck on her nipples. He was devouring her and she wished he had taken his underwear off so he could slip inside her. But Nick seemed to have other plans. He was now trapped between her legs and grinding into her, one hand on her right breast while leaning on the other elbow.

"Nick," she whispered again and she moaned when he kissed her deeply.

Her hips were pushing back against his and she thought she could come just like this within a minute. He was dry-humping her and she was tasting herself on his lips, and she was ready to blow.

But once again, Nick pulled back.

"Don't leave me hanging like that," Olivia said, hoping to sound annoyed, but Nick just laughed.

He continued laughing when she flipped them both over and whipped off her bra. His hands flow up to her breasts again.

"So fucking perfect," he said and the reverent tone in his voice made her heart flutter.

"You're not so bad yourself," she quipped, needing some levity before any unwanted declarations of love might fly.

Nick just chuckled and accepted the deflection - for now. He bit his lip when Olivia scooted back over his raging hardon. When she freed it from his underwear and put her mouth on him, he bucked up into her mouth. Olivia moaned and closed her eyes, taking him in as if he was the most delicious candy she'd ever tasted.

"Oh Liv," Nick sighed, running a hand through her long locks.

She was taking him in so deep that he could feel his tip hitting the back of her throat and it was sexy as hell. She was breathing through her nose and sucked him like a pro until he was ready to empty himself inside her mouth. Just then, she pulled back and he knew it was payback. But it was the best kind of payback and he laughed. She was on him again, kissing him deeply and he wrapped his arms around her, caressing her back and ass while they kissed. They moved together so fluently that at one point they wondered where they ended and the other began. Their naked bodies saw every corner of Olivia's bed and once they couldn't hold back any longer, Olivia jumped on top of Nick once more and impaled herself on him.

Nick bucked up eagerly, wrapping his hands around her hips. His entire body was tingling and he knew he had a few fresh marks in very special places, but he would wear them as badges of honor. Olivia Benson had marked his body and he wanted the marks to be there forever.

"Ooooooh yeesss," Olivia groaned, throwing her head back and leaning her hands on Nick's chest.

It felt so good to have him fill her up again. He stretched her to her limits and she knew she was ruined for all other men. She barely remembered now what sex with Brian had been like. It had been nothing like this because this … was unforgettable.

Their bodies were sleek with sweat as they moved together, faster and faster until the inevitable would be upon them. Olivia's thighs were burning but there was no stopping or changing positions now.

"Liv! Oh! Liv!" Nick cried out.

"Nick! Oh god yes!" Olivia cried back.

She was panting and Nick was thrusting upward, harder and faster, hitting all the right spots while rubbing her clit with his thumb. Olivia couldn't stop grinding into him and it all just felt so good. So fucking good.

"Liv! I'm …"

"Yes! Yes! Yes!" Olivia screamed and then a mindblowing orgasm washed over her, making her body shake and convulse.

Nick felt her body starting to milk him and it was his undoing. He pulled her down hard and stilled for a second, until he felt his body start to pulse, releasing his seed deep inside his partner. Olivia moaned and they started moving again, their bodies shaking and contracting together, still reeling in ecstasy. Nick loved to hear Olivia push out these uncontrolled high-pitched pants of pleasure and knowing how much she was herself right now, prolonged his own pleasure as well. They weren't just fucking anymore. She was giving him something and he wanted to give her everything he had in return. When she finally collapsed on his chest, Nick wrapped his arms around his trembling partner.

"That was amazing," she whispered, kissing his jaw.

"I have never felt like this before," Nick admitted.

"Me neither."

"I don't want to stop doing this, Liv."

After a pause, Olivia answered,

"Me neither."

"How about other guys?"

"Don't need them when I can have you. Other girls?"

"Nope. I can't handle anyone else besides you anyway."

Nick heard Olivia chuckle and he kissed her forehead. It wasn't a declaration of love and he knew neither of them was ready for that. But being exclusive sex buddies was more than he could have hoped for with Olivia Benson.

"Bed partners?" he asked her and Olivia lifted her head to look at him.

She was smiling.

"Bed partners."

They sealed the deal with a kiss and when Olivia deepened it, they both knew that this night was far from over.

The End