A/N: Been working on this for a while, a one-shot which is now a 5 part fic! It's completed so I'll be updating when I get reviews :D

Set a week before Addison tells Derek she stayed with Mark but Mark didn't come to Seattle in season 3 (so no booty call!) And she didn't get pregnant by Mark in New York so there's no abortion to speak of! Pretty sure that's all you need to know :)

Let it go, let it roll right off your shoulder
Don't you know, the hardest part is over
Let it in, let your clarity define you
In the end, we will only just remember how it feels

Our lives are made in these small hours
These little wonders, these twists & turns of fate
Time falls away, but these small hours
These small hours still remain
- Little Wonders by Rob Thomas

Little Wonders
Part 1 of 5
~x~

Addison groaned as her alarm clock rang out, she reached her arm out and smacked it so it shut off, she sat up and rubbed her eyes a little, her head throbbing in pain, she stopped still as she felt a body move next to her, she turned her head and held back a scream at the sight of Alex Karev lying next to her, and then it all came rushing back.

"Oh god" she whispered, slipping out of the bed and throwing some pajamas on "Oh god, oh god, oh god" she cursed, she grabbed a pillow and smacked him with it.

"What?" he groaned, she smacked him again "What?" he groaned again.

"Wake up" she hissed, he groaned and opened his eyes "Please tell me I'm just imagining what happened last night, please"

"We got drunk and had sex" he mumbled, reaching out of the bed and grabbing his boxers from the floor, slipping them on under the covers "It's not a big deal"

"Not a big deal?" she said with a slight laugh "Not a big deal? Are you kidding me? This should never have happened, ever, and I swear to god Karev if you tell anyone about this I will kick your ass so hard…."

"Well, my ass is yours until you say otherwise right?" Alex smirked, Addison let out a frustrated scream and hit him with the pillow again "Oh relax" he laughed as he got dressed "I won't say a thing, I promise"

"Good" Addison said crossing her arms over her chest.

"It was good" Alex said with a slight grin as he put his shirt on.

"Shut up" Addison said rolling her eyes a little.

"Admit it, you had fun" he said stepping towards her, his hands coming to her hips.

"I don't, I, Alex" she said frustratedly.

"The way you were screaming my name" he whispered into her ear huskily "I'd say you had fun" Addison let out a slight whimper, Alex kissed her neck, then her jaw, then her lips "Goodbye Addison" he said with a smile, he ran his hands down her sides and kissed her again before leaving the room, Addison groaned a little and collapsed back onto her bed.

~x~

1 week later.

"Stop it" she said firmly as she worked in the NICU with Alex.

"Stop what?" he smirked.

"Looking at me like that! Stop it!"

"Looking at you like what?" he said with a laugh.

"Like you've seen me naked" she hissed.

"I was not looking at you like that" Alex smirked "I think someone has sex on the brain"

"You're infuriating" Addison groaned "I am going to have my lunch, and you, are going to shut up, ok?" she glared.

"Ok" he smirked, Addison left the room quickly, she headed down the hallway, she went to turn the corner but stopped still as she saw Derek and Meredith flirting with each other, she suddenly felt a hand pulling her into a supply closet "What the…." she started as she came face to face with Alex "Alex please" she said with a slight whisper "Not now" he stepped forward and pulled her into a hug.

"He's such an idiot" Alex whispered softly.

"I'm the idiot" Addison sighed, her hands coming around his back and feeling his muscles, she let out another sigh and buried her face in his chest "I think, I think I might, go back to New York" she said quietly "I can't stay here and watch them anymore"

"You're not that person" Alex said firmly, he slid down onto the floor, his back against the door, he pulled Addison with him so she sat on his lap, her head buried in his neck "You're not the person who runs, that's him, he runs, he ran from New York"

"He found me naked with his best friend Alex, of course he ran" Addison mumbled.

"It wasn't as cut and dry as that though was it" he said softly.

"It doesn't matter anymore" Addison sighed "My marriage is over and he's moved on before the ink on the divorce papers is dry, I just need to get a grip and get over it"

"You don't need to get over it yet" Alex said stroking her cheek softly "It's ok to be upset Addison, it really is"

"I'm just tired of feeling like this" she mumbled, dropping her head a little, Alex pushed on her chin a little and brushed their lips together, as the kiss deepened Addison's pager bleeped, Alex let out a groan.

"I have to go" she whispered glancing at her table, she left without another word, Alex dropped his head against the door with a sigh.

~x~

"Ad...Addison" Alex stuttered as he opened his apartment door that evening "Um, how did you, know where to find me?"

"Looked in your file" Addison replied simply "You alone?"

"Uh yeah it's, just me" Alex said with a small smile, Addison pushed past him and walked into the apartment "Addison, is everything ok?" he asked as he shut the door and turned to face her, she threw her bag onto the sofa followed by her coat, Alex watched her intently, Addison stared right into his eyes as she slowly unbuttoned her shirt and dropped it to the floor, she pulled the zip on her skirt and shimmied out of it so she was stood in her underwear and heels.

"What are you waiting for Karev?" she asked with her hands on her hips, Alex moved quickly towards her and scooped her up in his arms, she squealed with laughter as he carried her into the bedroom.

~x~

"Oh my god" Addison laughed as she lay next to Alex, both of them panting heavily "That was, amazing"

"Yeah" Alex said with a slight laugh "That was, incredible"

"God we have a thing, a very hot, thing" she said disbelievingly "I don't think I've ever, it's never been that, amazing before" she breathed, she climbed on top of him and kissed him hard on the lips "Mmm" she hummed with content.

"You are incredible" Alex said squeezing her ass a little "I love it when you cum" he whispered huskily "The noises you make, it's so so hot"

"Derek never made me cum like that" she whispered kissing him again "He had nothing on you" she said rubbing her hands over his chest.

"You never screamed for him?" Alex said with a slight raise to his eyebrow "You mean you stayed with him for all that time and he never made you cum like that? Did Sloan make you cum like that?"

"No" Addison whispered "I swear, you're the only one who's made me cum that hard"

"Wanna do it again?" Alex asked with a grin, groaning slightly as her hands reached under herself and took him in her hands.

"Why are you even asking?" Addison said with a laugh.

~x~

1 month later.

"Hey" Alex said quietly as he entered the NICU, he glanced out of the windows and found nobody looking so he pecked Addison's lips.

"Alex" she hissed swatting him away "Someone could see"

"Let them" he smirked.

"I would rather the whole hospital not know about our little, deal" she said firmly.

"I know ok?" he sighed "Sorry"

"Ok" Addison said with a small smile "Are you free tonight? I could come over for a little while, or, not"

"No no, come over" he said squeezing her waist a little "Wear that black corset, with the suspenders" he whispered huskily.

"Do you know how long it takes me to put that thing on?" she pouted.

"Yeah" he said with a slight laugh "I just love taking it off you" he said stroking her hips a little.

"I'll be there at 8" she said quietly.

"See you there beautiful" he whispered kissing her neck before leaving.

Part 2 of 5 to follow…