AN: Hello everyone, I love all the reviews and feedback I get as well as ideas I hope you keep them coming.I also want to thank everyone who added this story to their alerts and favorites, so Thanks ! :D

For Mark the last few months had been hell. There was no other way to describe it, for once in his life he told himself a woman was off limits but his body and heart didn't seem to agree. Everything she did drove him crazy. He could still remember her reaction when he told her about Addison that alone made him want her even more.

(Flashback)

It had been a long week and to top it all off Mark and Derek had a talk about Addison. Mark still had not told Derek about his child and what really went on between him and Addison, and he felt like he needed to at least tell Lexie to get it off his chest. Mark did not know why but he felt like he couldn't ignore the fact she probably had questions and he did not want to lie to her.

Lexie seemed to sense that something was on Marks mind and while they were relaxing on the couch after Nathan went to bed so she asked him if there was something he wanted to talk about.

"Why have you never asked about Nathan's mother? It is obvious you have questions?" Mark asked Lexie.

This was true Lexie always had a curious look in her eyes when people asked if Nathan was their child she didn't know what to say and she never knew what to say about the woman who gave Nathan life.

"I do have questions" Lexie said tentivly like she was afraid she would say something wrong.

"You can ask you know, I don't mind."

"Okay, What was her name?"

"Her name is Addison and she was married to my best friend. We had and affair." Mark said with a sigh and looked over at Lexie who was starring at him silently pleading with him to continue.

"I was practically raised by Derek's family he was, if my best friend. When he and Addie got together I was happy for them and they got married, which was great except I had feelings for her. I thought I loved her and as time went on Derek began spending more and more time at the hospital and I began spending more time with Addison. Before I knew it we were having sex and I wanted her to tell Derek but she wouldn't. I suspected then that she didn't really love me but I didn't care and soon after Derek caught us together."

Mark got up pour him self a scotch then sat back down. Taking a deep breath he continued to tell Lexie what happened.

"After that Addison realized that she loved Derek and that I was the mistake but it was too late Derek had up and left town and Addison found out she was pregnant. She didn't want him, Nathan, she wanted a child just not mine and she had plans to have an abortion."

Lexie looked up in horror she loved Nathan and could not imagine her life with out him. Lexie could tell how much Mark loved his son and silent tears were running down her cheek as Mark continued to tell her what happened between him and Addison.

"I found out about the pregnancy in time to convince her I wanted my child and that she could leave him to me. At fist she was against the idea and I secretly hope carrying Nathan and giving birth to my child would make her love me or at least stay but it didn't. After she gave birth to Nathan she didn't even hold him she just signed away her rights and a few hours latter signed herself out of the hospital and I haven't seen her since. I know she loved him in her own way I just don't think she wanted me or anything that tided her to me at that time."

With that Mark looked up expecting Lexie to be discussed with the fact he slept with a married woman but in stead he saw tears running down her face.

Lexie looked up at him and wrapped her arms around him.

"You're a great dad Mark and no one can take that from you. It doesn't matter how you got Nathan, all that matters who you are now and that is a great man and father."

(End Flashback)

It had been a few months since Lexie got the job and things had been going horribly! Sure she was great with Nathan but Mark was another story. Lexie was strangely attracted to the single father and she couldn't help it, despite the fact she did not want to have feelings for him. If Lexie closed her eyes she could still see Mark standing in front of her shirtless and it was enough to get her all riled up and it was all she could dream about to.

(Flashback)

Lexie had just finished putting Nathan down for a nap and was headed to the kitchen to start dinner as she exited Nathans room she collided with a shirtless Mark who grabbed hold of her as they stumbled back hitting the wall. All Lexie could think about as she slowly pulled herself away from Mark was how perfect he was, he wasn't to white and you could plainly see his six pack and all the muscles he possessed in his upper body. His upper body was hard yet soft at the same time when he held her against him to stop them from falling she had never felt so warm and safe in her entire life. Lexie was blushing like crazy and trying desperately to stop herself from running her hands across his chest. Lexie knew than that she was in deep trouble. So she quickly muttered sorry and ran down the stairs to make dinner leaving Mark standing there shocked.

After seeing Mark topless Lexie called her sister while making dinner for some advise she was going nuts it was like fate was kicking her ass and it was hell. Much to Lexie's displeasure her sister thought it was hilarious that Lexie was trying so hard push her feelings for Mark aside. Molly believed that Lexie should just kiss him and bring him home for dinner because everyone wanted to met him. Needless to say Lexie hung up the phone raking her brain trying to think of a new confidant that would be on her side.

(End flashback)

Living together was definitely hard on both Mark and Lexie. Lexie had lived with men before but they were just friends and she was never attracted to them which meant she never had any problems living with them. Living with Mark was so different it was like every time she saw him it made her want to be with him more and more.

Mark was having the same problem. Mark had never lived with a woman before but Addison and there was nothing really to that relationship besides sex. With Lexie it was different it was like they were in a relationship minus the sex. They talked, cooked together, ate together, watched TV together, took care of Nathan together. In many ways they were like a family and though they both knew that they would never admit it.

Lexie frequently talked to her mother and sometimes her not so helpful sister about Mark and what was going on in the home. She told them about her attraction to Mark and how much she grew to love Nathan. Listening to Lexie talk about Mark made Susan believe that there was more going on then her daughter wanted to admit but she knew better than to bring it up until Lexie was ready to admit that she had feeling for Mark and was willing to act on them. Molly on they other hand also knew this information but used the "knock some sense into you" method and continuously told her sister to go for it and to stop worrying which of course never worked.

Mark also felt like he needed to talk to someone about what was going on in the home and with Lexie. He did not feel that she could talk to Derek about anything and if he told someone at the hospital and hour latter it would be all over the place. Therefore he called Mama Shepherd to vent and try to figure out what was going on in his life.

Ms. Shepherd knew after the first few times Mark called that this Lexie woman was definitely good for the man she thought of as a son. She remembers when Mark called freaking out about the interview he had with Lexie and how she got the job. She knew her son had fallen hard for this woman but was in denial and she couldn't blame him, after everything that happened with Addison he was bound to be cautious. It didn't help that Nathan loved Lexie because that meant that is something went wrong with there relationship not only would Mark's heart be broken but so would Nathan's.

Chuckling to her self she remembered the call she got from Mark when he saw Lexie in a towel. She had never heard him so nervous in her whole life. He was freaking out and going on and on with how she looked in a towel. How her shoulder length hair stuck to her face and how the towel clung to her allowing him to see all her curves and he could just see the tops of her breasts. How her skin was the colour of porcelain and glistened under the light in the hallway. How her legs where long and muscular but in a very feminine way, and how her body was just amazing. She could tell her son was so far gone listening talk about the way Lexie looked in a towel. She did not know if he even knew how long her trailed on for but she did. And she knew he was falling in love with her and she just prayed everything would work of for the three of them. Ms. Shepherd wanted Mark to be happy and this Lexie woman was the perfect woman for him. She had a feeling Lexie would never hurt him and that she would put him in his place if she needed to, she really wanted to meet Lexie but knew she had to wait until they were ready to admit their feeling for each other or it would just cause problems and she didn't want that.

AN: Please Review and let me know what you think. I love to hear your thoughts, opinions, and ideas. I hope you all have a great weekend :D