A/N : They really can do it anywhere. Seriously. This is by Lisa (McDreamy) aka McMarried9 from The Incision. Bathroom squee! -giggles-

Addison sat in one of the booths at Joe's with Miranda Bailey across from her. Bailey was one of the few friends Addison had in Seattle, which most certainly was a product of her long hours and the fact that she wasn't any Interns favorite attending. She did enjoy Bailey's company; the woman had a sense of humor.

"…and so the bar tender says just take her jacket off," Bailey finished her joke.

Addison nearly choked on her margarita as she laughed, "Wow. That was funny, Miranda."

Bailey nodded and took a sip of her drink, granting Addison the chance to let her eyes wander to the group who had just walked in the door. It shocked her to see that in the middle of the group, which included Burke, the Chief and an attending Addison recognized from plastics. She had thought Derek was still at work.

Her eyes trailed him as he took a seat next to the attending from plastics at the bar.

"Something on your mind, Addison?" Bailey broke Addison's concentration.

Addison shook her head and returned her attention to the sandwich in front of her and took a bite, "Sorry. Were you saying something?"

Bailey launched back into a story about something Addison wasn't paying any attention to the woman. Her eyes had drifted to Derek, again. She found it strange that he was there and hadn't even chosen to acknowledge her.

Just then, Derek casually spun in his barstool and fixed his gaze on Addison. The steadiness in his stare caught Addison off guard and she had to avert her eyes. When she dared look back up, Derek was no longer watching her and engaged in a conversation with the other men.

Addison sighed; maybe she had just imagined it, "Have you made the decision on your fellowship yet?"

She was trying to engage Bailey in a conversation that would allow her to concentrate on Derek. Her eyes drifted back over there, and once again they met his. Their gaze locked and he cocked an eyebrow before standing up an walking down the hallway to he bathroom.

Was she supposed to follow? Addison didn't know. But she quietly excused herself from the conversation and walked into the bathroom.

Derek was leaning against the counter with a smirk on his face, "The counter is sturdy enough to support us, but the bathroom stall would be infinitely more of a challenge."

"What the hell are you talking about?" Addison asked incredulously.

"Bathroom sex, you and I are having some," Derek grinned.

"You're awfully presumptuous, aren't you?" Addison crossed her arms across her chest.

"Am I?" Derek took a step towards his wife and gave her lips a soft kiss.

Addison's tongue instinctively flicked out to lick where his lips had been. Pleased with her reaction, Derek leaned back in and placed another fleeting kiss on her lips.

"So, where are we going to do this?" He wondered, his lips merely inches from hers.

Her eyes darted over to the entrance to the bathroom; it was a simple swing door with no lock. Someone could walk in at any moment.

"Gotta do the stall," Addison breathed heavily as Derek guided her back into a stall, pushing the door shut behind him.

Addison curled one leg around his waist as he pressed her against the wall of the stall. She ran her hands through his hair as he placed a trail of steamy kisses down her neck and collarbone.

She moaned as he lifted her skirt up her thighs, providing him full access. The last truly coherent thought that ran through her mind was that she really hoped Bailey didn't get the urge to use the bathroom.

After their romp in the bathroom stall, the Shepherd's stood in front of the long mirror adjusting hair and clothing. No one would have logically expected a thing, unless they took a look at their flushed faces.

Addison looked over at him, "Bathroom sex, huh?"

"I have a thing for it," He shrugged and took her hand.

The Shepherd's, together, returned to where Addison had been sitting with Bailey and slid into the booth together.

"You were not here before," Bailey pointed an accusing finger at Derek.

Derek and Addison exchanged knowing looks and Addison shrugged, "I found him on my way to the bathroom."

"Okay, you're nasty. And I'm leaving," Bailey moved to stand up.

"Miranda, don't. We're not kicking you out," Addison reached for her friend to stay.

Bailey shook her head, "You two knock yourselves out. I've got a husband of my own waiting for me at home."

Derek looked toward his wife once he knew Bailey was out of earshot, "Bailey and her husband doing… it. That kind of turns my stomach."