Disclaimer: Law & Order SVU/OC and its characters don't belong to me. This story has been written for fun only, not for money. Also, English is not my native language, so I had some help with vocabulary, but all ideas and dialogues are mine.

Spoilers: Somewhere around the start of SVU24/OC3. Written before the S25/OC4 seasons.

Summary: OC and SVU are doing an undercover operation.

Please enjoy and review!

The Last Undercover

By musical-Aven

They found themselves in an opulent Casino-type bar, under a warm, dim glow of lights, on a Friday night. Both SVU and OC squads were collaborating on an undercover assignment trying to catch the owner of the club for money laundering and sex trafficking.

Stabler sat at a polished poker table. His persona, Mike, was a smug, rich and successful gym owner. He sat at the table with the owner itself and a few of his associates, playing in a more private room of the club. The plush leather chairs, the intricately designed wood paneling, and the cigar smoke in the air made the room exude exclusivity. Still, the sounds of subdued conversations and the occasional clink of glasses from the main bar area resonated in the backdrop.

Mike was married to his college sweetheart, Maria. When developing the operation, nobody had asked who should play that part, as Olivia had been the obvious choice. Both partners had agreed, but were still a bit awkward about it.

Maria was glamourous and classy. Most of all, she loved spending her husband's money. That had been the excuse for Mike to join the poker game, at least.

Right now though, Maria had been left at the bar, as her husband had been called into the private room. It was all part of the operation. The main bar area was a tapestry of colors, adorned with neon lights and the energetic chatter of rich business men and their wives. No girls were seen just yet, but Benson kept her eyes open for unusual business.

Detective Reyes stood behind the bar, playing his part as another pair of eyes and backup if needed. And Jet had given both of them earpieces for communication. Stabler didn't have one in case the owner's men searched him. The operation had been on for the last few hours.

As the game unfolded in the private room, a waitress presented Elliot with another glass of whisky. That'd had been the third one already. Elliot slowed down his drinking on the second, wanting to stay sharp over the night. He thanked the waitress, but set the glass on the table not touching it yet. He ignored the glances from the men around the table, trying to look concentrated on his hand for now.

A minute later, the energy of the room changed when men looked up from their cards towards the entrance. Elliot saw Olivia talking to the bouncer at the door, clearly flirting with him to get inside. He refrained from frowning as this wasn't part of the initial plan. After the owner made a nod to the bouncer, he let Olivia, or Maria, in.

She smiled at the group when approaching the table, her steps a little sloppy, but Stabler knew his partner better than that. He waited for her play, trusting.

"There you are." She purred, strolling behind her husband and draping herself over his shoulder.

Elliot stiffened only for a moment, a subtle reaction not lost on Olivia. She enveloped him with her arm, leaning in close to his neck.

"Been looking for my husband for the better part of the last hour."

Her words sounded both foreign and right to the partners. Their current whatever-it-was relationship was unstable, to say the least, and this part of the assignment was always going to feel like they were walking a fine line between them.

Struggling to maintain focus, Elliot finally found his voice.

"I've been here, trying to win this money for you, baby." He replied in a similar tone, fully immersed in their roles, but still aware that their teams were listening.

He could swear Fin was smirking right now. The men around the table seemed convinced of their act.

"Yeah, trying is the right term." One of the players smugly remarked, revealing his winning hand and claiming the jackpot at the center of the table.

Frustrated reactions, and a couple of swears, followed as cards were thrown onto a pile. Elliot reached for his glass, but Olivia swiftly intercepted, downing its contents in one gulp, surprising him. Suppressing his frown, Elliot barely registered the exchanged glances around the table.

"Maybe you should drink less and play better." She teased, her eyes flirtatious. Something else was behind them as well but Elliot couldn't quite read it.

If he were honest, it was damn hard to concentrate, with Olivia this close to him, her scent overwhelming him. When her breath smelling of whisky hit his face and her eyes darkened (he could swear) from desire, Elliot found himself fighting hard to remind himself of where they were. He's speechless a few seconds too long and Olivia realized her effect on him. Smirking, more than for show, she took back control, helping her partner.

"Please guys, no more drinks for my husband, I need him sober later tonight…" She implied and Elliot inhaled sharply to keep his face from breaking.

"Damn, Mike, how do you get your woman to keep wanting you after so many years of marriage?" One of the guys commented and Olivia played along, giggling loosely into Elliot's neck.

Stabler closed his eyes a second savouring the feeling and fought to keep a moan escaping his lips. This was an Olivia so different from what he knew. She was so comfortable at showing her affection to him, and in public. It made him want this in their real lives even more. Running a hand down his chest, Maria replied.

"Simple: he knows how to treat his woman." She answered, implying everything they were already thinking.

The men around the table laughed and made whistle sounds in response. Mike didn't reply, he just shrugged confidently.

Glancing back at his partner for a moment, Elliot was brought back into the operation when he saw the spark in her eyes telling him she was playing her role.

Drunkenly giggling, Maria buried her face into her husband's neck again. Olivia refrained from kissing him fully, but her lips lingered longer than necessary, they both knew it.

"Make me proud, honey." She whispered into his ear loud enough for the entire room to hear.

Finally, she straightened up behind him, making Elliot miss her warmth immediately, before walking off.

Stabler, along with every man in the room, followed the sway of her hips with their eyes until she was out of sight. Elliot took in a long breath. Oh she knew what she was doing.

After several more rounds of cards, Stabler acknowledged that their intended move wouldn't happen that night. Despite establishing valuable connections, the key targets didn't trust him just yet. Exiting the private room, he scanned the main room for his wife without success. He locked eyes with Reyes behind the bar, silent question in the air, and the Detective gave him the signal. Time to leave and meet at the van.

When he reached the van outside the bar, he was expecting to find Olivia there as well. Closing the door behind him, he turned to Bell.

"Where's Benson?"

The Sergeant shared a glance with Fin before answering.

"Mercy's."