Even before she opened her eyes she knew whose arms were encircled around her bare waist, that masculine smell that probably cost more than she made in a year was all too familiar. Cursing to herself she opened her eyes which confirmed what she already knew, she had slept with Richard Castle.

It was undoubtedly his room, the shirt he had worn the night before was strewn over the lamp shade and the rest of their clothing was lying discarded on the floor. Groaning to herself she realised that she had no idea what happened last night. How on Earth did she end up in bed with her partner and now be unable to remember a single detail?

Trying to recall the night she just had was hard, what with the rather large headache she was suffering thanks to copious amounts of alcohol from the night before. The team of detectives had gone to Castle's for a few drinks after a tough case and it seemed Beckett drank more than she had planned.

It hadn't even occurred to her that she was still snuggled tightly to her partner, their legs entwined and his arms holding her to his somewhat impressive chest. That is until the man in question began to stir.

Beckett tried to squirm out of his grasp but before she could he pulled her back flush against him. Beckett held her breath, praying that he hadn't woken up; maybe just maybe she could still get out of there without him waking and hopefully he remembered about as much as she did from the previous night.

Slowly turning she saw his eyes still closed, she relaxed, she could still repair this situation. She'd go in just a minute, really, she couldn't resist the chance to see the usually dramatic man at ease. He truly was handsome. His hair messy and a childlike smile gracing his features, something that seemed just so Castle that Beckett couldn't help but smile.

Snapping herself from her musings she once again attempted to get out of his grasp. Slowly she extracted her legs from his and was about to attempt the same with his arms when the door opened. A surprised Alexis let out a little squeak before covering her eyes and talking fast so that she could leave the room as soon as possible.

'Sorry. I figured it was Dad's phone that kept ringing down stairs so I thought I'd bring it up for him.'

The door shut behind the embarrassed girl and Beckett groaned. So much for making the night disappear.

'Well, this isn't what I expected to wake up to but I'm sure I could get used to it.' Beckett turned in his arms to face the smirking man.

'Castle! Your daughter just walked in on us, together, in a bed, naked.'

'Oh crap.' Rick fell back into his pillow and threw an arm over his eyes. 'She wasn't supposed to be back until after lunch.'

'It's three in the afternoon.' Beckett was shocked at the time, she couldn't remember when she had last slept this late.

Castle groaned. 'Don't worry. Alexis has been through worse all it will take is a little Castle magic and she will never mention it again.'

'How can you be so cavalier about this?'

'Just trust me on this.'

'Fine. But just know that I have a gun on me at all times.' The smirk on the writer's face told the detective that he was about to make some sort of innuendo but a glare silenced the man. 'Now, what are we going to do?'

'I'm sorry.'

'Sorry for what? It's as much your fault as mine.'

'I shouldn't have brought out the last bottle of...' Castle thought for a moment, 'bottle of something.'

'You don't remember it either then?'

'Wait, if you don't remember anything, and I don't remember anything we might not have even done anything.'

'Look around. Your shirt is thrown over a lamp shade with half the buttons missing. I don't even need to be a detective to figure out what that means.' Beckett said gesturing to the offending item.

'Richard.' Martha's voice made the detective want to hide herself under the covers like a child.

'Gran, he's still sleeping. Let's just leave a note.' The lack of noise seemed to signify that the two had left the area.

'I love my daughter.' Castle whispered to himself.

'That was close.' Beckett sat up against the headboard of the bed. Ready to argue with Castle yet again.

'I'm starving, how about we talk over breakfast. Nothing reduces awkwardness like Rick Castle's famous choc chip pancakes.'

Hearing her own stomach rumble she couldn't deny that breakfast sounded good. 'Fine, but you go down first, just in case they are still there.'

Beckett held the sheets over herself as Castle got up. She watched him wander across to his dresser, she tried to divert her eyes before he turned but she didn't quite make it.

'Checking me out Beckett?'

'I just thought I'd return the favour. God knows you've done it to me enough.'

'I was just being a gentleman holding the door for you.'

'All's clear.' At Castle's call she got up and opted to not wear her clothes from the night before. Instead she rummaged through Castle's dresser and found a pair of his sweats and a t-shirt. They still smelt like him and although she wouldn't admit it she rather liked wearing his clothing, it made her feel delicate and feminine which isn't something that happens often when you are a female homicide detective.

Beckett walked into the kitchen and slid onto the stool in front of the breakfast bar, her fingers played with the edges of the note that Alexis had so kindly decided to leave. Castle handed her a glass and some aspirin, taking it gladly she stayed quiet.

'So what do you want to do?' Castle asked while flipping a pancake.

'Pretend that it didn't happen. I can't get involved with someone that I work with.' Beckett tried to deny that Castle looked a little hurt.

'I think it's a little late for that.'

A knock on the door made both people jump.

'I'll be back in a second.'

Hearing the familiar voices of Ryan and Esposito, Beckett prayed that they wouldn't walk into the kitchen.

'We went to her place and she wasn't there so we figured she'd still be here.'

Beckett shrunk back on her chair when she heard multiple footsteps coming towards her. So much for keeping it a secret.

'As I was saying, Beckett and I both drank a bit too much and so she stayed here the night. I slept on the couch. Nothing happened.'

Esposito looked at Ryan sceptically. 'There was a home invasion on the corner of third and twelfth. The Captain sent us over when no one could contact you.'

'We'll be there in an hour.'

'We've been trying to contact you since 11; you might want to get there sooner than that.'

'I have no spare clothes and it takes at least thirty minutes to get to my apartment.'

'You can borrow something of my mother's?' Beckett looked at Castle incredulously, 'Alexis' then.'

'I still have my clothes from last night; I can just throw them back on.'

'We'll meet you two there in thirty.' The two detectives showed themselves out the door, the exchange of money as they walked out didn't go unnoticed by Beckett.

'I guess breakfast will have to wait. I'll make the coffee, you go shower and change, you'll feel so much better for it.'

Beckett pushed herself off the stool, walking up the stairs she peered down at the writer who was humming to himself content. He is not content, that would mean that he's happy with what happened. It's not right, we work together.

Holding up her top in the light she realised that it wasn't fit to be worn again. She was too busy with the last case to go home and get changed so she had worn those clothes for over twenty four hours already. Opening up Castle's closet she grabbed the closest white button down that she could find and threw it on along with her pants from last night.

'That shirt has never looked so good.' Castle was leaning casually in the doorway from the bathroom.

Beckett rolled her eyes. 'Just get dressed so we can go.'

They were at the scene within forty minutes. Lanie looked Beckett and Castle up and down with a smirk earning herself a glare from the detective. After briefing them on the case Lanie pulled her friend aside.

'No makeup, a men's button up and a grimace whenever there's a loud noise. Why detective Beckett... Is that the walk of shame?'

'Castle decided that I was too drunk to make it home and he wasn't exactly fit to take me anywhere either so I stayed the night, but no we did not have sex if that's what you're implying.'

Lanie looked up at her best friend raising an eyebrow with a twinkle in her eye. 'And I'm Santa Clause. Girl, do you really think I don't know my own best friend's 'I just had the best sex of my life face'.'

Kate groaned. 'What? It was only second best? Really? I've always pegged Castle for being spectacular.'

'It's not that, well I wouldn't know actually. Past you and Esposito leaving I can't remember anything.'

'You finally slept with him and you can't remember a thing?' The look on her face told more to her best friend than any words could. 'Uh-huh.'

Across the other side of the room Castle was receiving a similar questioning from the boys. Beckett and Castle shared a look, one that clearly said 'we just had sex but don't let anyone know' to anyone who was looking.

'We've both decided to just let it go. It was a drunken mistake.'

'You both decided or you decided?'

'I decided but Castle didn't object,' knowing Castle better than that Lanie raised an eyebrow. 'Alright, if you must know the conversation was interrupted by the boys.'

'You have to talk to him, I know Castle and he isn't going to just let you go. Not after so many years of pining after you.'

'He hasn't pined after me.' Lucky for Beckett who was quickly losing ground there was a murder to investigate. 'I think we should get back to work. This case isn't going to solve itself.'

'Just do it.' Beckett stalked away with a glare.

I will continue on with this very soon but I liked leaving it here for the moment.

This is my first Castle fanfic so constructive criticism is very welcome. I'm sorry for any mistakes I haven't had this Beta'd but I know there will be many.