Michael's eyes burst open and he quickly jumped out of bed. The trailer was dark and quiet but he didn't need to see anything to know what had happened. This was the third time in less than a month. He quickly tried to pull the wet sheets off his bed. He hoped he would be able to do it without waking his mother but he wasn't that lucky. His little footsteps and rustling of the sheets woke her.

"Michael?" she called out into the darkness, sitting up in bed and reaching for the light switch to illuminate the bedroom. She turned to her right, checking to see if Derek had also woken from the sound only to discover that he was still not home.

Michael signed and gave up on the sheets. He stood in the doorway of the room and looked at his mother shamefully. "I hased an accident 'gain." he whispered. "I's sorry, Mommy."

Addison got out of bed and moved toward her son. She crouched down to his level and helped him take off the wet footsie pajamas. "Take off your undies too, buddy, then get in the shower and we'll get your cleaned up and back to bed." she told him softly. She grabbed the wet underwear he kicked to the floor and quickly threw both items in the washing machine just behind her while Michael got in the shower. After quickly washing him off she help him get dressed and ushered him toward her vacant bed.

"I's wants ta sleep in my bed."

"Honey, your sheets are all wet. I have to wash them. And these sheets are the only ones small enough to fit your bed, we don't have another set. You can sleep on Daddy's side of the rest of the night, okay?"

"What about Daddy?" Michael asked. "He'z not home 'gain, Mama."

"I know, honey. He's at the hospital." she answered. He'd called her to tell her that his last surgery was going to run much longer than he expected, something about a rare complication. She just assumed that he would be home by 3 in the morning.

"Oh..." Michael mumbled as he climbed up into his parents bed and curled up on his father's side.

Addison pulled the blanket up around him and leaned closer to kiss his forehead. "Get some sleep, baby." she said softly and moved to dim the light. She just needed enough to see what she was doing while she stripped his bed.

This was his third bed wetting incident since they had moved into the trailer a month earlier. He'd never had that problem before that. It had only happened one time before their move to Seattle when Michael was 2 and a half and just coming off potty training. He wet his bed just one night after Derek left his family without warning. Addison slowly realized the pattern. All three of the incidents in Seattle where after they moved in with Derek and only on the nights when he wasn't around and in New York it was just when he realized his father was gone.

"Michael." Addison stopped what she was doing and went back to her son. "Did you see a bad dream, honey?" she asked.

"Daddy not home." he whispered.

"I know he's not, but I'm home."

"You's a girl, Mommy. You's can't fight wiff monstas at night!" he exclaimed.

"I don't know about that, Mikey, I'm pretty strong." she insisted to assure him that he was safe even when Derek wasn't around.

Michael shook his head. "Not as strong as Daddy." he shot back. "And there's lotz of Monstas in da forest and we's live next ta da forest!"

"Monsters are not real, sweetheart." she told him softly.

"Yes they is! I seed them in my dream!" he told her forcefully and on the verge of tears. "You gots ta tawk ta Daddy, kay? Cuz I don't wanna liff in da forest wiff monstas wiffout him."

"I'll definitely talk to Daddy about it but you don't have to worry tonight. Today is monster holiday. They're all off today so they can't do anything."

"How do ya know?" he asked skeptically.

Addison thought about it for a minute and then smoothly said, "I read about it online."

"Hey." Derek grinned when walked out of the bathroom and came toward the bed. "Do you enjoy torturing me?"

"What?" she asked, giving him a confused look. Did he not want her around anymore? Was their relationship torturing him?

"That dress you wore to work today. It showed off all those sexy curves and your boobs looked fucking amazing your legs..." he trailed off to take a breath.

"Then you took it off and wore scrubs and tied up your hair into that perfectly messy bun and it made me even more turned on."

Addison rolled her eyes dismissively. "I've worn that dress a million times and you never particularly cared for it before."

"That was in New York when I valued OR time more than sex." he reminded her. "Sex trumps the OR." he told her surely as he rolled on top of her and pressed his lips to hers. "I've been waiting all day to rip your clothes off."

Addison stiffened. She was visibly hesitant and Derek was taken back by it.

"What is it? What's wrong?"he asked.

"We can't do this today." she told him.

"Why not?"

"I think I've got a UTI and I don't want to have sex and run the risk of making it worse."

"You think you a UTI?" he repeated. "Why would you think that?"

"I peed like nine times today. I had a two hour surgery, which, you know, is not that long, but I left three times to pee! And it burns so bad."

"You wanna do a urinalysis tomorrow? I can write you a lab order for it, just piss in the cup and give it to me and I'll put Jane Doe on the paperwork and personally take it to the lab." Derek asked her. "You might need antibiotics or something."

"No, Derek, I'm not going to give you a cup of my piss, as you so eloquently put it. I'll wait a few more days. It might be nothing." she answered hopefully.

"Well, is that it? Have you had other symptoms?"

"No, not that I've notice. It might be nothing, I don't want to jump ahead of myself. I just don't want to risk sex."

"Okay." Derek nodded understandingly. "But we could still cuddle tonight if you want. That might be a compromise. I can still be close to you that way and we won't be doing anything sexual."

Addison nodded her permission and moved so her back was pressed against his chest. She felt his arms wrap around her waist and in that moment that's all she could ask for.

"You want to tell me what's on your mind?" Derek asked her softly, his ones hand moving up to twirl her hair around his index finger. It was something he always did when they cuddled.

"Michael has been wetting his bed a lot lately." she told him.

"Mother/son urinary issues, huh?" Derek joked.

She elbowed him in the side then turned in his arms so she could look into his eyes. "It's nothing medical, Derek. He only does it on the nights that you're not home. He's afraid of not having someone to protect him, he's afraid that you won't come back and that you'll leave him again."

"I'm not planning on leaving you guys again."

"You weren't planning on leaving us last time either. You didn't come home with the plan to walk out on us..."

Derek quickly moved away from her and sat up. "I didn't walk out on you. I left you. There is a difference." he pointed out, obviously angered by Addison's accusation. " And I wasn't planning on coming home to see my wife fucking my best friend in my bed. I had the right to walk out."

Addison sighed and moved back toward her side of the bed. She knew he was not going to let her forget her mistakes so easily and she didn't expect him to. He had a right to be upset and bitter over what she did. She just hoped that maybe there would be a time when he wouldn't constantly hold it against her.

"Forget I said anything." she said quietly, hoping to keep the fight from escalating. "I'm tired of fighting about the same things constantly."

"What? You mean when you blamed me for leaving and causing insecurities in my son you weren't expecting me to point out that I only left because of you. You don't want to admit that you're largely to blame for this disaster of a marriage. It's just easier to constantly blame me for being absent."

"This is exactly why I wanted to go back to New York. Because we're never going to move on from my actions, Derek. It's always going to be an issue..."

Derek got out of bed, he didn't even bother changing. He just put on his coat and moved toward the door but not without turning back to her. "I've been trying so hard to make this work, Addison, but you make it so hard sometimes."

"You're leaving?" she asked in a shaky voice.

"Yes, I am leaving. I need to get away from you right now before I get angrier and say anything else that I might regret tomorrow." he told her.

"He's going to freak out if he wakes up and you're not home." Addison murmured, looking across the trailer to see her son still soundly asleep.

"Then you can tell him that Mommy drives Daddy crazy and sometimes Daddy needs to go away for the sake of his sanity."

And sure enough Michael did wake up halfway through the night. He quickly moved toward his mother and nudged her from her light sleep. "I's haved anotha accident." he told her.

Addison reached for the light and sat up in bed. Just as she was about to get out of bed the door opened and Derek walked inside. Michael quickly ran into his arms. "Daddy! You's gots to make the monstas go away!" he exclaimed.

"Don't worry, buddy, I'll never let any monsters hurt you." Derek promised as he got the little boy in the shower while Addison stripped the bed and threw the sheets in the washing machine.

She laid out a fresh pair of pajamas for her son just as Derek wrapped the little boy in a towel. He eased all of his son's worries about monsters and got him in the bed beside Addison.

"Daddy you's gonna stay, right? You's not going 'gain? Cuz if ya go and da monstas come back then I's gonna pee 'gain and this time I's in you's bed so Mama's gonna get wet too..."

"I'm not going anywhere, baby boy." Derek promised as he got back into bed beside his family. "I know I get angry sometimes and I say and do lots of things that I don't mean to. But I'm really trying my best to be here for you. I love you." he said while occasionally glancing over Michael's shoulder to look into Addison's eyes so she would know that his words applied to her too.

She never replied, just stared down at her son who was starting to doze back off into sleep.

"Addie." Derek whispered. "I never left. I was outside on the deck the whole time."

"But you weren't in here with me. You asked me to move to Seattle and I did, I gave up everything and came here. You asked me to give you another chance, you asked me to move in here with you and I did all of it. I did it because I want this to work and it won't if you keep walking away. It's not just hurting me, if it were just hurting me I wouldn't care. It's hurting Michael too. We've already hurt him enough, we can't keep doing it."

Derek nodded. "I'm sorry." he apologized. "I over reacted and got defensive for no reason. I didn't mean to hurt either of you." he said, hesitantly moving his hand over the barrier Michael created between them to reach for her hand. "I've been trying but I'll try harder. I want this to work as much as you do."

She stood in the OR, wincing in pain at the cramping in her abdomen. She hoped her intern for the day, Alex Karev, and everyone else in the OR didn't notice it. She had no such luck.

"You okay, Dr. Montgomery?" the anesthesiologist asked her. "Do you need to take a break?"

"No, no, I'm fine." she replied without looking up from the procedure. "Can someone get me acetaminophen or ibuprofen?"

"Headache?" the man asked.

Addison briefly looked up to meet his eyes. She quickly nodded before turning her attention back to her patient. It was a lie, she didn't have a headache. She just didn't want people to know something was going on with her. "Didn't have time to have coffee today. Withdrawals are probably kicking in." she elaborated to be more convincing in her lie.

Another forty minutes went by before she felt like she simply could not deal anymore. "Karev." she spoke up. "Do you think you can cover me for a few minutes? Just keep him stable, I doubt anything will happen while I'm gone."

"Where are you going?" Alex Karev questioned.

"I have to pee, Karev. Is that okay with you? I didn't know I'd need to get permission for you." she addressed him with her signature glare.

She quickly left the OR and ran toward the nearest bathroom. She went straight into a vacant stall and lowered her scrub pants to see a blood stain on her panties. She let out a heavy sigh, her heart starting to pound faster in her chest. It wasn't her period, she was spotting. She took a minute to calm herself, it wasn't necessarily anything serious. Stress causes spotting she told herself. And she's been very stressed since moving to Seattle. It's just the stress, she repeated to herself all the way back to the OR. She had too much going on to give it anymore thought.

Her list of symptoms continued to grow as days went on. There was one night when she just wanted to take a hot shower and put her worries behind her and that's when Derek decided to join her. Despite her hesitance, she was relieved to know that her husband wanted her so she didn't stop him. She let loose and tried to enjoy herself and it worked up until a cramp crippled her.

"Derek." she groaned. To her it was a release of pain but for Derek it was a sign that she was closer to her climax. He wrapped his arms tightly around her waist to keep her hoisted up against him.

"Yeah, baby..." he murmured into her ear as his lips brushed against the side of her neck. He pinned her against the wall, pushing his wet body closer to her.

"You close?"

"Ow, Derek, stop. Stop." she begged, pushing him away from her.

Derek eased her down on the ground and took a step back in the small shower. "Addie?" he asked her, the concern obvious in his voice and his eyes.

"I'm sorry, Derek. It hurts. I tried to enjoy it, I really did but it became too painful." she admitted regretfully. "I'm sorry, I don't know what's wrong with me."

"Don't be sorry, none of this is your fault." he replied softly, reaching out to tuck a strand of wet hair behind her ear. "I'm just worried about you and I want you to be okay. Maybe you should go see a doctor. First it was painful urination and now it hurts during sex and I'm sure there is more that you have not told me about. You need to see a doctor, honey."

"I see a doctor every time I look in the mirror. I'm fine. I think I would know..."

Derek cut her off before she could finish her sentence. "Addison, we've been over this many, many times, especially during your pregnancy. Just because you are an internationally ranked OB/GYN, does not mean you can be your own doctor." he reminded her.

"I know. If anything else happens I'll see a doctor." she promised her husband. The problem was she was starting to realize the gravity of her symptoms. Separately they were nothing serious but combined it was something she didn't even want to consider. "Now will you please get out of here so I can finish my shower."

Derek nodded and stuck his head out past the shower door to make sure Michael was still asleep. He reached for a towel and wrapped it around himself as soon as he got out of the shower. That's when his pager went off calling him back to work. He quickly changed into a pair of jeans and an old sweater. He scribbled a note for Addison telling her he had to go work and kissed his son goodbye before taking off.

She was done with her shower twenty minutes later. She fully expected to put on a pair of boxers and a t-shirt and fall asleep in her husband's arms. She needed that comfort. But all she found was a note on his pillow telling her Derek had been called away. It was yet another night where she'd fall asleep alone. The only difference was that this time Addison knew all too well that her future held nothing but struggle. Now she'd have to fight to keep her crumbling marriage from completely falling apart again and she'd have to fight to keep her undiagnosed but highly suspected illness from burdening her family.

Sorry it took me forever to post this. I kept changing it because I wanted the last chapter to flow well with the first chapter of the original story. Hope you guys like it. Let me know what you think :)

I'd also appreciate ideas for one-shots and stories. No promises that I'll be able to write them but it might help kick start ideas in my mind. Thank you!