Ok... So I suddenly remembered a story I read years ago when I was very much into the Game of Thrones books and shipped Arya and Jon and went looking for fics, and well I found them , there's this specific one which I tried finding for referencing but couldn't anyhow it's basically the same premise... A drunk wedding in Vegas and a whole lot of problems in the morning after. Enjoy.

"My heart tells me this is the best and
greatest feeling I ever had.
But my mind knows the difference
between wanting what you can't have
and wanting what you shouldn't want.
and I shouldn't want you.
― City of Bones, Cassandra Clare

Her head started pounding at the first slip of consciousness and her still closed eyes squeezed shut even more trying to block all light but failing. Phoebe wasn't the type to pass out drunk and she was absolutely NEVER the type to have a one night stand but as she started getting aware of her legs and arms there were definitely someone else under her, and as she tried to move she realized just how entangled they were, their legs were linked, both her arms seemed to be found over the person's chest and apparently her face was also and she was just now realizing the pointy chin pressing lightly the top of her head and the foreign hand touching the small of her back. More shocking to her but if thought about, not really a surprise at all, was that she found herself still naked and, as she felt skin under her thumbs, she realized so was the guy, just how drunk was she last night?

The first thing she decided was to try not to wake this person until she had had enough time to compose herself and face him, which she was reflecting if there would ever be such occasion. In any way she opened her eyes slowly and observed the half of the room in front of her, gladly she made a plan to run over to the half open bathroom door she was so happy to see a few feet from the bed. In a burst of courage she untied her arms and as childly as possible grabbed the sheet and runned to the door without ever looking back.

The bathroom was not at all what she was expecting, there had clearly been someone who used it as she found still wet towels right by the door and she could swear her eyes were seeing a wedding veil and social pants torn in the floor. Phoebe decided suddenly she need to get out of this place the sooner the better, she then reached for the sink to wash her face and grabbed a look of herself in the mirror, her hair was a mess and somehow still stuck in a half bun , she started taking off the pins still on her head while looking at her face, for what it was worth she didn't appear that bad, there were shadows under her eyes from sleeping with eyeliner on but other than that she was ok. Her neck said otherwise. There were at least half a dozen hickeys going all the way down to her breasts... She decided to attend the problems she could solve at the moment, finishing to let her hair down and splashing her face with water.

She thought about how she had gotten here, her family had won a week in LA in a promotion her father entered for a free vacation and the night before Max had convinced her to ditch their parents and come with him to... Somewhere, she just could not remember at all the rest of the afternoon but somehow she ended up in a suite with a random guy, oh she is going to kill her brother!

At the moment, Phoebe had done all she could in that bathroom, she even searched for her underwear in an attempt to stall but as she didn't find a thing, she knew it was time to get out into the room again but her hand seemed stuck to the doorknob. Taking a deep breath she slowly opened the door and even though her eyes went straight to the bed, there was no one there. Her head turned to each side and found a figure with his back at her holding some papers by a desk on the portion of the bedroom she hadn't been yet, at least not been in this morning as by looking at the pieces of clothing spread all across the floor they had been over there at some point... The guy had the sense to put on his boxers at least but also had nothing else on, she had been quiet so he didn't turn right away but as she looked more and more to his silhouette her heart started aching as if already aware of what's to happen, her mouth couldn't hold a gasp and as her hand reached her lips in a attempt to hold herself he turned. Their eyes met and they froze.

The man she had woken in the arms just minutes ago, the one she found herself naked with, could not be the same one she was staring at right now, no, NO! Because this was her brother, her twin. But his eyes were burning right through her and even as she tried miserably lying to herself, it didn't matter cuz the truth was right there in front of them. He found his voice first.

"- Phoebe... - he didn't know what to say, the paper he still held in his hand allowed his turning to face her to not be a complete surprise but still this was mental, a nightmare of some sorts. His tone reached her ears as an soothing one and her brain sounded a small alarm, why isn't he as surprised as her?

She took a step towards him, how could he face a piece of paper instead of her when he just found out they s-slept together, what was more important?! She reached him and yanked the paper from his hands "- What in the world are you looking at AT THIS MOMENT WHEn..." - her voice died out as soon as her brain processed the bold letters on top of the page 'Marriage Certificate'. Her eyes traveled to the paper to find something her already revolted stomach was not ready '...unite in Holy Bonds of Matrimony Max Thunderman & Phoebe Thunderman...'. Her eyes were stunned in surprise but still in a way seeking comfort she looked at him and his face was a reflection of her own, surprise, disbelief and... disgust? No, something else, but she didn't have time to figure it out before her legs collapsed. In a fraction of seconds she was in his arms, he was holding her and as theirs eyes met a fire rose through then intoxicating the air, making their skin burn where he touched her and a flash of memories came back, their lips clasping together, hands all over and the fire burning them alive with desire. She pushed him away so hard she fell to the ground, it hurt but her head didn't even register, her mind was unwillingly still replaying over and over again the portion of last night's events she had recalled.

He couldn't bear the look in her eyes when she pushed him away, the sickening look she still bearred while looking at the carpet in that hotel room. His hands ached to help her and he could only hold himself so long, he reached for her again this time placing both his hands on her shoulders and bringing her over to the bed. The sheet she was involved with fell and he turned away, he grabbed the white button-up shirt he probably wore the night before and still facing the other way handed out to her "- You g-got, uh, just put this on."

She looked down and blood reached her cheeks at the same moment, the sheet she was curled up in had fallen and everything from her belly button up was on full disposal, she glanced at him quickly and calmed down when she saw his face facing the wall, Phoebe grabbed the shirt and put it on, it was big for her so it must be his, still buttoning the last buttons she eye searched the room for her pantie and found it right by the nightstand, still blushing she told him where she had seen his pants and instructed him to go and put them on, using this opportunity so she wasn't so ashamed of fixing herself.

Max came back to the room a few minutes later holding his phone in his hand, and as she glanced anywhere but him, announced shortly "- It's 3 p.m., my phone is almost dead and mom called 21 times already..."

"- I'll call her from here if you go and find a gift shop or something and buy something for me to wear cuz I can't go out wearing that" - She pointed to the dress all wrinkled up under the window beside the bed, even messed up it was still very much recognisable as a wedding gown. He agreed and wearing the social pants and the white tight t-shirt he was probably using under the social gear he left her alone in the room.

She grabbed the phone on the nightstand by the bed but couldn't manage the courage to call, she didn't lie much, especially she didn't lie well and not to her parents but the fact of her mother worried sick about them was worse so in a split of braveness she dialed the number and waiting never hurt so much, she was nervous yes, but also ashamed and lost in a mix of emotions she didn't know how to control.

Barbara Thunderman picked up as soon as her phone started ringing and her daughter's voice did just as much to calm her as to bring a whole new set of worries "- Who's this? Phoebe? Where are you calling from? Are you okay? Is it your brother with you? Have you-" - Phoebe cut her before she asked more questions that she had answers for.

"- Mom calm down! We're fine, I'm fine. Max and I drank a little too much yesterday and decided it was best to just rent a cheap room than drive all the way back to the family's hotel that's all, sorry we didn't call earlier my battery died..." - She wasn't dumb enough to ring up her mother without a a least thought through excuse, she had decided a simple one was the safest bet. As usual she got it right.

"- Oh darling, you're absolutely right I'm much happier with you twinsies being safe, it's so cute you started ranging more together now that you guys are older. I guess it's all fine then, but don't you think, even for a second, young lady that just because you're now 22 I'm not gonna lecture you the very first minute you get here, but for now I'm just glad my babies are ok. Call me. Bye, love yah." - Phoebe actually felt like a weight already installed in her chest was suddenly lifted while she rang up. Her mother was ok, she didn't suspect a thing and, of course not, they were brother and sister. There should be something those words meant, some line that existed never to be crossed, with the exception they did.

She waited. He took 12 more minutes. That was 13 more minutes than she needed alone, thinking by herself. She couldn't begin to process the fact they slept with each other but her mind couldn't even form the words to her biggest worry, still her thoughts betrayed her every bit of sense and did. What if she gets pregnant? What will they do then? She didn't find an answer and when the door opened her fear became anger, anger at this situation, at the world, at their veins for running with the same blood and very much anger at him.

He closed the door behind him and walked over to her. As if knowing she would be mad he handed her the bag of clothes without mouthering a single word. She got madder. "- Mom is okay so you know"

"- Good. Found a 'I heart Vegas' shop right outside."

"- Great, took you long enough." - She didn't give him a chance of reply, only grabbed the bag from his hands and closed the bathroom door behind her. Max dropped himself there, on the floor, by the bed and waited for her.

She came out wearing the tourist shop set, walked over and sat by the side of the bed, not a single second glaring anywhere but the carpet floor and than suddenly filled the silence with the most calm and sure voice she could manage "- The marriage may have happened but the certificate can't ever be valid." - She made the sentence sound as much a one sided argument as possible but he still replied, acidly.

"- Of course it's not valid, it doesn't matter the state we're in cuz nowhere in the world, not a single place, would allow us to get married to each other, we are brother and sister." - He looked at her then, only to regret a second later, because the moment their eyes met the pain burst through making everything glow dark red in agony.

"- We are. Brother and sister. Then what is this?" - She pointed to the undone bed as her face showed a mix of disgust and just plain exhaustion "- We have known that our entire lives, still you were within me and not only once or twice so we could have stopped, we still didn't. I... I h-had you i-inside me, I w-wanted that, even when you are my brother. Then what am I? What kind of wrong I am when I let that happen, when I remember liking it... We knew and still it didn't change anything, it didn't stop us. SO STOP LOOKING AT ME. Just stop" - Her voice finally broke when the tears fell not quietly but at such a rhythm that her breaths came short and produced ugly hiccups full of pain.

When he moved in her direction, unconsciously trying to comfort her, the painful scream that left Phoebe's throat paralized him still with a hand outstretched "- NO" - That was all she said but somehow her rejection made it all hurt much more than the knowledge of the feelings they shared. He needed her in every way.

Just as much as she needs him.

Her hands were shaking in her lap and the tears were falling still, her heart pounded like a broken clock as she raised her head. She wouldn't, she couldn't, hurt him not any more, a hand moved then, almost as if it had life of its own. Her fingers crossed the space between them and little by little, one by one, grabbed hold of his. Their eyes found each other one last time and just like this they knew, they knew that some way, somehow, it would all be ok.