This ideal has been floating around in my head ever since I heard Katy Perry's "Waking Up In Vegas" and it just screamed write me lol. Hope you like it, leave me a review and let me know what you think this is my first e/o story by the way. So I hope it's not too bad for you to read.

Disclaimer: I own nothing.

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Olivia Benson felt one thing when she stirred into consciousness pain. Her head was throbbing in sync with the heart beating in her chest. Her lips felt dry and swollen, her thighs were sore, and her back felt stiff. The only thought that passed though her mind was never drinking ever again. Very few times had Olivia Benson ever truly went out and got completely wasted, with her mom being an alcoholic, she has sworn away from the bottle but there had been a few times where she had let herself go so to speak she could actually specifically remember the last time she had been wasted, it was the night of her high school graduation she had when out with friends, got completely trashed and woke up in the quarterbacks bed she shivers at the memory.

Olivia felt like she was reliving the memory now though, she had no idea where she was. She was finally able to will her eyes open only to shut them back from the blinding sun light streaming though the blinds of what appeared to be a hotel room window. But what alarmed her more was the strong arm wrapped around her torso pulling her against a bare chest. It felt familiar, yet she couldn't place it, she could feel chest hairs prickling her back and something slightly hard against her left but cheek. But before she had time to deliberate on that, she found herself face first in a white porcelain toilet with her knees slammed into the cold tile of the bathroom floor emptying the contents of her stomach. She felt her body break out into a cold sweet as her stomach lurched again. She feels a thick blanket being wrapped around her shoulder she pulls it tighter around her, before sitting back against the wall opposite the toilet. She shuts her eyes trying to get the thumping heart rate in her chest under control.

"You ok Liv," alarms go off in her head when she hears his voice.

She shakes her head unable to form any words, she feels the stickiness of the layer of sweat that has formed against her brow. She senses him knelt beside her and the warmth of his hand as he brushes stray hairs back from her face, she looks at him for the first time and notices a white sheet wrapped around his waist. She has seen Elliot in various stages of undressed before but seeing him with only a sheet warped around his waist sans a shirt just makes her hot all over and sends another wave of nausea through her body.

She lurches forward and empties her stomach for a second time that morning. She feels him pull her hair from her face and rub soft circles across her back. What the hell is going on? She woke up naked next to her partner? Obviously they had had sex, wait she had sex with her partner, she had sex with Elliot, divorced Elliot, her best friend Elliot. Oh God this can't be happening. She didn't know which was worse the fact that she had had sex with Elliot, or the fact she couldn't for the life of her remember it.

"What happened," her voice hoarse from a night of screaming in pleasure or from just puking her guts out she wasn't really for sure at the moment. She looks up to see him wetting a white wash cloth he places it across her forehead as she leans back against the wall.

"I honestly, don't know," he shrugs, "I woke up to the sound of you in the here and came to check on you," she blushes, "Sorry," she mumbles out, he lets out a hard sigh and runs a hand though his short hair, "What the hell happened last night Liv,"

She shakes her head and shrugs her shoulders because she honestly doesn't know either, "the last thing I remember is you telling me to put my money where my mouth is and me proceeding to throwing back shots after shots," she shakes her head wondering what the hell she was thinking last night.

"I think we may have um….," he trails off, and its then she realizes just how sore her thighs are. "Yeah," she bites the inside of her cheek and studies his face and is surprised to see he look slightly scared, which makes her wonder how she must look because she's just flipping out inside.

"Are you ok," he looks concerned

"Um…well I just woke up next to my best friend and partner naked so how do you think I feel," she asks sarcastically and shakes her head at him.

"Well if it's anything like I'm feeling your feeling pretty scared shitless," she can't help but laugh at his honesty, but agrees with him 100 percent, she is scared shitless, partly because she can't remember what the hell happened, but mostly because she wonders what this will do to their friendship, not to mention their partnership.

"How bout we go back in the bedroom, maybe there's something there that can help us piece back together last night," he suggests, she nods and he waits for her to stand.

"Um....I will just meet you back in there," she pulls the blanket tighter around her, he nods and walks out of the room.

Once his gone she stands and wraps the blanket around her body, trying to cover her nude form best she can not that it really matters now since his already seen everything anyway, she sighs at the thought and shakes her head as she walks back into the bedroom. She gasps when she sees his naked back marked with red marks down it. "Oh shit," she mumbles out.

"What," he turns to face her, "Um…your back," she points and he looks back over his shoulder trying to see what is wrong, "You need to look in the mirror,"

"Huh," he walks over to the vanity and turns to look in the mirror, "Damn Benson," he examines his back, and she sinks onto the bed mortified, "You're a tiger," he laughs amused and slightly turned on by her marking him the way she had if only her could remember he thinks as he runs a finger across one of the red marks her turns to see her on the bed with her face in her hands.

"This cannot be happening," she shakes her head looking up at him.

"Come on Liv, so we had a little too much to drink last night and ended up sleeping together it happens right,"

"Not to us Elliot, were cops were not suppose to be out getting hammered," she rolls her eyes at his attempt to justify last night.

"So we had one night of bliss, I mean the whole reason you asked me to come to Vegas with you was to get my mind off the divorce," he shrugs sitting down beside her on the bed and placing a hand on her covered knee.

"Well I didn't ask you to come here so I could shag you," she stands gathering the blanket around her and going to stand by the window. The farther apart they are right now the better, because seeing him in just that sheet is doing something to her that it shouldn't.

"I never said you did, and that's not what I am thinking, I don't know you didn't intentionally bring me here to seduce me Liv, it's not your fault or mine it just happened," he shrugs.

"This doesn't change anything between us," she questions nervously watching the city below her going on about their day.

"It doesn't for me, dose it for you," he questions, turning to look at her back.

"I don't for me either but, I don't know if I will be able to look at you the same now, especially after the way I shredded your back, I'm sorry about that by the way," she apologizes shaking her head and turns to look at him.

"Don't be, it must've been pretty damn good for you to mark me like that, if only I could remember it," her head snaps up to look at him not sure if he really said that.

She's about to respond back when a yellow piece of paper on the wooden dresser catches her eye she walks over and picks it up. "What's this," she holds it up for him to look at, he shrugs his shoulders walking over next to her to and looks at it, "Hmm um…I don't know…what's it say,"

"Hunka Hunka Burning Love Wedding Chapel 12:00 pm, and the address," she looks at him with wide eyes, "What the hell did we do last night,"

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Well that's the start. What do you guys think they did in last night? If you want to know leave me a review and I will update with chapter 2 which is half way finished (hint hint). I accept anonymous reviews btw.

Thanks for reading!