Dean woke up to a pounding headache and a dry mouth, he opened one bleary eye and saw Castiel fast asleep next to him, he was flush against his chest with one hand clutched at his t-shirt. He frowned for a moment looking at him as he tried to grip of his head and what had happened.

He shifted a little rubbing his lips together when he froze and looked towards Cas in shock, had he kissed him? Not just a kiss, but a full on, passionate, kiss that actually made him tingle all over and desire flood him from what he remembered. He remembered the groan Cas gave as he shoved him against the wall and kissed him back, he couldn't deny it was one amazing kiss.

But it wasn't right, not one little bit, this was his best friend he was talking about and he had kissed him out of his mind on booze. Lisa sprang to his mind and he covered his mouth with a groan, he had cheated on her with him.

"Cas" he murmured shaking his shoulder.

He stirred a little but sighed deeply ignoring him. Dean rolled his eyes at him and gently shoved him to wake him up.

"If you don't wake up now, I will shove you on the floor and you know I will" he muttered and closed his eyes grimacing in pain.

Castiel blinked and looked up at him frowning and then realised where he was and how close he was, he shifted back and let go of him feeling awkward and nervous.

"Oh" he mumbled looking around and remembering where he was, he bit his lip gently and looked back up to him wondering if he remembered.

"Before you ask… yes I remember what happened"

"Good, would be a bit hard to explain"

"Yeah" he mumbled rubbing his forehead. "Couldn't get me an aspirin could you?"

"Yes" he said and jumped up hurrying away to the bathroom for his tablets. Dean watched after him and felt unease stir inside him, would this little moment of pure madness change everything?

Castiel came back with water and aspirin for him and smiled gently. "How's the hangover?"

"Wonderful, my head is a drum, my stomach is upside down and I want to be sick, it's awesome" he grumbled swallowing them down with a grimace.

He shifted slightly and looked up at him. "I'm sorry"

"What for? The kiss?"

"Yeah, I didn't mean it"

Castiel looked away and felt like he had been kicked in the stomach very hard, he carefully sat down next to him and nodded.

"Of course"

"I'm engaged Cas…it was a silly, drunken and stupid mistake…call it a spur of the moment thing, yeah?"

"Yes" he whispered looking down at his hands.

"Things won't change will they? I can't lose you over this"

"No, it's in the past" he muttered and with a tight smile looked up at him.

Dean nodded and groaned lying back down. "I need more sleep"

"I'll leave you to it" he whispered and went to get up and leave when Dean grabbed his wrist and tugged it gently.

"Please tell me you aren't leaving here annoyed or upset with me?"

"No, and no…It's fine, go to sleep" he lied and smiled reassuringly.

"Okay…" he whispered and let him go, Cas walking quickly out and slamming the door behind him. He rested against it and closed his eyes in defeat, he knew what would happen, he knew Dean would say it was a mistake but it really, really hurt to hear him say it and he knew things would be different now, they always were.

He returned back home to find a note from Anna.

Cas,

I don't know what happened to you last night but I want details when I get home!

Please get some shopping in with money I left!

Anna x

He crumpled up and threw it at the ball with a sigh and threw himself down on the couch with a groan. This wasn't going to be easy.

~0~

A loud knocking on his door woke Dean up and he groaned sitting up.

"I'm coming!" he shouted frustrated and moved to open it and Sam fell in.

"You forgot me"

"Shit" he muttered looking at the time, 2.35pm, and gasped in horror. "I've been asleep for nearly 8 hours! I'm sorry Sammy, major hangover"

"It's fine" he laughed shutting the door behind him. "Been celebrating?"

"Something like that" he muttered pulling out his phone to see 2 messages, one from Sam and one from Lisa, he didn't see one from the one he wanted most.

"Well, congrats! Newly engaged man, never thought I would see the day"

"Why's that?" he said curiously.

"Because you used to be a whore"

"Hey! I was a teenager with raging hormones!" he protested and went to get some juice.

"So? Lisa has finally calmed you down then?"

Dean nodded and remained silent.

"You okay?" he said seeing the frown in his forehead and looking over him concerned.

"Yeah…just tired and ill I guess, so how is uni and the new girlfriend?"

"Really good so far and she's good, I can't wait for you to meet her" he admitted with a small loved up smile.

"It'll be you next!"

"Marriage? We've just started going out!" he cried making Dean chuckle.

He looked down at his phone again wondering whether or not to call him.

"Waiting for a call? You are staring at that thing like you are waiting for something"

"Cas" he muttered.

"Oh! Is he alright, I need to catch up with him as well"

"I'm sure you'll see him later and yeah…something happened last night and I am bit worried"

"Oh right, what?"

Dean shook his head tapping his phone against his palm. "Something stupid but…it felt really right"

Sam blinked confused to what he was saying and held up a hand.

"I'm confused, something that happened to him or both of you?"

"Both of us…"

"What happened?" he insisted but Dean shook his head again not wanting to discuss it with his brother he had kissed his best friend.

"It don't matter" he said with a sigh and moved to the living room to sit down.

"You are acting really strange Dean"

"Aren't I always?" he smirked leaning back and looking up to him.

"Yeah but you are even more strange today, last night must have really affected you"

Dean looked away and nodded thinking back to the kiss. "Yeah, it really did".

~0~

"Spill"

"I can't, Anna!"

"You can't or you won't?" she cried pointing a threatening finger at him.

"Both! Leave it alone" he warned crossing his arms and looking away from her.

"Just tell me where you were then"

"Dean's"

"Dean? Has…has something happened?" she gasped and he turned to glare at her.

"No!" he cried hoping the lie wouldn't be uncovered, he was a terrible liar.

But somehow she believed him and threw up her hands in defeat.

"Fine! Be like that, I'm going for a bath, you can stay here and sulk mister"

He stuck his tongue out at her and watched her leave to the bathroom, he hadn't spoken to him all day and all he could think about was last night. It did something to him and he wanted more of him, it hurt to think that right now he could be all over Lisa or worse. He curled up and rested his chin on top of his knee staring at the flickering images of the television.

His phone buzzed unexpectedly and saw a message from Dean asking him to meet him.

He text him back asking where and when to receive a quick one, his place because Sam was staying at his girlfriends and Lisa wasn't back till tomorrow.

He took a deep breath to muster courage and set off to his house wondering what he could possibly want from him.

"What do you want from me?"

Dean looked up at him as he walked in and shut the door behind him.

"Er, it's called knocking and I answer Cas"

"Why? It was open?" he frowned.

Dean brushed it away and leaned against the counter staring at him.

Castiel felt insecure and slightly intimidated under his watchful gaze and shifted looking around the house before setting his eyes on him.

"What?"

"I can't stop myself from thinking about last night…it's hurting my head"

"I know"

"Why does it feel wrong but also right! I mean, this isn't us, we don't do this sort of stuff and normally I could brush it aside but it won't go away" he cried and started to pace up and down the kitchen. Castiel watched his every move and feeling his heart pick up its pace ever so slightly at his words.

"I don't know, Dean" he murmured looking at the carpet and feeling scared to look at him. "You did say last night that I was the spark missing in your…relationship"

"I did?" he said and stopped pacing to look at him in shocked horror.

"Yes".

"I can't remember that….okay, I want to try something! We did this drunk right? I was drunk; you were tipsy…so let's try it sober"

"What?"

"You heard me, Cas"

He blinked and tried to digest his words, Dean walking closer to him so he was stood in front of him.

"You want to kiss me again?"

"Or you kiss me, either way, let's just test it okay? Just once" he murmured feeling his confidence slacken slightly but kept it up.

"Okay"

Castiel took charge this time by grabbing the front of his t-shirt and pulling him down into a hard but gentle kiss. Dean groaned as the spark burst into light and opened his mouth slightly to allow him gently in, Cas gently slid his tongue into his mouth and kissed him fiercely with their mouths moving gently against each other.

Without a single care, Dean slid his arms around his waist and pulling him closer, Castiel wrapping his arms around his neck moaning into the kiss. It was different than last night, this time they both knew what they were doing. Dean moved his hands across his hip bones trailing his fingers across them gently making him squirm and moan into his mouth and parting from him gasping.

"Well?"

"Yep, spark" he muttered thickly staring down at his lips wanting more than anything to do it all over again.

"Go on then, I can see it in your…" he said and was cut off as Dean silenced him with his kiss and backed him up against the kitchen counter.

Castiel being daring and knowing this could be his one and only chance of having him all to himself bit down on his bottom lip gently and tugged on it and relished the sound of Dean gasping and moaning.

"That was slightly kinky" he muttered with a small smile touching his bottom lip.

"Oh you've seen nothing" he murmured huskily and pulled him down into another kiss, Dean moving his hand up his top feeling his stomach muscles and tracing his ribs gently before reaching his nipple and tweaking it.

Castiel felt his cock twitch to life and closed his eyes with a loud sigh.

"Dean…" he muttered arching against him.

"Yes?" he smiled stroking it gently.

"I thought it was just a kiss"

"It is, I am being experimental" he whispered taking his hand away much to Cas' disappointment but was rewarded when he moved to his neck and placed hot kisses along it to the hollow in his neck.

He tilted his head back gripping his shoulders tightly with a loud moan.

"Well, well, Cas, who knew you were vocal like this" Dean muttered gripping the top of his hair and pulling him forward making him gasp at the pain and pleasure of having his hair pulled.

"This is nothing"

"Cas, are you trying to tell me something" he murmured gently in his ear and kissed underneath it gently not caring at all right now, he was right in front of him, he wanted it and it felt so right it was quite scary.

"No, was just saying I can be a lot more vocal than this" he whispered back and closed his eyes feeling his teeth graze the sensitive spot against his neck.

"I could make you scream" he muttered pulling his hair gently and chuckled to himself.

"Yes, god yes" he moaned and looked into his eyes.

"Dean, what is happening? Why have…"

"Don't question! Because it will mess things up if we start to think about it…all I know is right now, you are all I can think about, I don't know why, I don't know what it means for…anything, but can we just do this?"

Castiel stared for a long moment and considered it, it was this or nothing his brain screamed at it him and he listened to it and nodded slowly.

"Yes"

"Brilliant" Dean muttered in relief moving down to kiss him gentler this time and savouring the taste of him.

Castiel kissed him and pulled himself closer to him wrapping himself in his cocoon of warmth and relief flooded through him so fast it physically hurt, this is what he had wanted for so long but no one gets what they want without a prize to pay in the end, no one.