Talk about a sucker punch to the stomach. Mac felt all the air rush out of her body, her heart chipping in a few more places with the knowledge of having to let yet one more person down. Trish couldn't have possibly known about her endometriosis; Harm would never say anything about that unless Mac was okay with it.

Mac pulled her hands out from underneath Grams and Trish's before subconsciously resting them on her stomach much like she did at Harm's apartment just a few nights ago. She splayed her fingers across her flat belly and suddenly felt hollow and empty, aching to feel the little feet of her child kicking her or the feel of her child moving inside her.

But unfortunately, Mac knew that was probably never going to happen for her and as long as she was with Harm, she couldn't give him, Grams or Trish the child and grandchild they were hoping for.

Mac looked up from the imaginary spot on the counter she was staring at and looked from Grams to Trish. Taking a deep breath and summoning all the courage she had, Mac answered Trish's question the best way she could at the current moment.

"Harm and I have talked about kids and we would both like to have them, we're just not sure when that's going to happen."

One look into Mac's eyes told Grams and Trish there was definitely more to what she was saying but they decided to play nice. Instead of probing for more answers they took her response at face value and dropped the topic.

The remainder of the prep session was spent in a fun atmosphere while Trish and Grams sang and danced to the upbeat jazz music filling their surroundings. Mac watched them as they played and joked with happiness and moved around each other with a practiced ease similar to the way an old married couple would.

Once Mac realized her prep work was finished, she snuck out unnoticed through the front door, leaving Grams and Trish dancing in the kitchen. As Mac walked up the path towards the horse barn, she looked around the property for Harm only to come up short, so she continued walking.

Mac was becoming jittery and nervous. She had to talk to Harm. She had to tell him how she was feeling. They agreed they would work through Mac's issues together and this was something they needed to talk about...immediately. She had to find out how he felt about this in order for her to feel as though she hadn't made a mistake choosing to be with him.

Just when her nerves were starting to get the better of her, Mac stumbled upon the waterfall and Harm sitting on the edge of the fishpond, dropping little pellets into the water. One look at him caused Mac to temporarily forget about her fears and her nerves.

Instead, she allowed herself the pleasure to stare at him. He must have just finished a farm chore because his chest was rising and falling in a rapid manner, the way it did after she and him raced in Rock Creek Park. His t-shirt draped over his lap, his entire upper body drenched in sweat, his tank top stuck to him like an extra layer of skin. The only thought going through Mac's mind was, 'My god is he sexy.'

After allowing herself that moment, Mac knew it was now time for business. She took a deep breath and trudged ahead, taking a seat on the edge of the fishpond across from Harm. He looked up and smiled, a genuine 'it's nice to see you' smile. He leaned over to kiss her on the cheek and instantly knew something was wrong when she stiffened at the touch.

Not knowing what to say, Harm started with a simple, "Hey." Mac replied the same and began to fiddle with her thumbs in nervousness. Her nerves and edginess was returning and she hoped it wouldn't erupt into anger.

Harm reached out to put his hand over hers but retracted it before it reached the desired destination. If Mac flinched at his kiss to her cheek he was sure she wouldn't like him touching her hand. "What's the matter?"

Afraid to look him in the eyes, Mac kept her gaze on her hands before responding softly, "We need to talk."

Oh no, Harm knew those four words were never good no matter what the situation and this was no exception. He started to run through the past day and night in his mind, searching for something he might have done wrong so he knew the proper way to apologize for it but couldn't come up with anything.

They started off a bit rocky yesterday and had a few moments until finally admitting to one another how they felt. And that's when he knew. That's when he realized it wasn't something he said or did, whatever it was happened today. It was still fresh and on Mac's mind.

"Was it Grams? Were they asking you questions you didn't want to answer?" Harm didn't mean to sound like an interrogator or harsh with his words but he knew this was going to happen. He asked his mother and grandmother to not stress Mac out with tons of questions. He thought they would take the fact that Mac had never met them before into consideration but then again, they were always tough when it came to the women in Harm's life.

Mac sniffled in an attempt to keep her tears at bay, not willing to release them just yet. She shook her head then spoke. "No, it wasn't anything like that. Everything was fine…until your mother asked me about children."

Mac brought her gaze up to Harm's. She had to see what his reaction would be to this.

Harm's eyes became hard, knowing that one particular topic could possibly be the hardest topic for Mac to talk about. He was angered at the fact that his own mother would put her through that.

But then realization dawned on him. Trish didn't even know about Mac's endometriosis and if she had, Harm was sure she wouldn't have brought children into a conversation. His eyes then turned soft and filled with concern on Mac's behalf.

"Oh Mac, I'm sorry. She didn't…she doesn't know about…you know. I didn't tell her, I don't have the right to do so." Harm scooted closer to Mac and made an attempt to wrap her in an embrace.

Mac bolted into a standing position. It was happening…the hurt and nerves she felt were making her angry and she was un-able to stop it.

"Don't do it." She gave Harm a warning glare which told him he was safer if he didn't move from his perch on the edge of the fishpond.

"This isn't something you can fix with a hug and reassurances, Harm. This is something we have to talk about." Mac was beyond angry. She was furious. She was furious with herself for allowing her emotions to get out of control. She was upset that her emotions caused her to lash out at the people she cared about. And it was all because of an innocent question from an unknowing woman.

Harm knew from the years of experiences that when Mac was angry, pushing her only made it worse. When it became worse, she pushed him away and returned to her shell. And that was something he didn't want to happen.

Instead, he decided to give the calm approach a try. He raised his hands in mock surrender and placed a soft smile on his lips. "Okay Mac, we agreed to talk about these things together so we will. But why don't you sit down first, so you can be comfortable." Harm patted the empty space next to him with the hope of getting Mac to take a seat.

Mac crossed her arms across her chest and shook her head at his tactic. Rather rudely she replied, "No thanks, I'll stand."

There was a silence that wrapped around them, Harm unsure whether to speak first and Mac not quite sure where to begin.

"Why don't you tell me what happened, Mac? Then we'll go from there." Mac exhaled heavily before telling Harm about her talk with Grams and Trish. How she told them about she and him finally deciding to give the relationship a try.

Mac then told Harm about the way Trish just sprung the question of children on her and how it took her a moment to answer.

"What did you tell her?" Harm looked up at Mac and knew this was going to be a tough conversation to have. But this was also a conversation they needed to have.

Mac sighed in frustration then replied softly. "I told her that we talked about having kids but we weren't sure when we were going to have them."

"We can still have kids, Mac. Whenever you're ready." Harm looked up at Mac with hope only to be shot down.

"Don't you get it, Harm? I CAN'T HAVE KIDS! And as long as you're with me you won't have them either!" She was seething mad. If she were a cartoon character, steam would be shooting from her ears, her body becoming red due to the anger. He just wasn't getting it.

All right, so the calm approach wasn't working for Harm anymore. As much as he wanted to stay calm and collected, it looked like it was time for a traditional Harm and Mac fight.

Harm stood up from the fishpond and stepped toward Mac, stopping when he was close enough for comfort, but still giving her the space he knew she wanted.

"The doctor said you have a four percent chance. Let's be real, not the greatest odds. But that doesn't mean we can't adopt or foster." Harm kept his voice low but held a tone that let Mac know he was becoming angry.

"It's not the same, Harm! You're not a woman so you don't understand!"

"Then make me understand!"

"Yes, adopting and fostering a child makes someone a parent. But it's totally different from being a mother, Harm."

"You don't get to feel it move inside you. You don't get to have a product of the love you share with someone. You don't get to give birth to a baby that grows up to look like his or her mother and father, that shares the qualities of each parent."

By the end of her tirade, Mac's anger and voice began to dwindle. She released one of the major burdens she had been carrying. The tears started to slowly fall down her cheeks where she wiped them away with her hands.

Harm sat stunned. He wasn't expecting for Mac to be so angry. He didn't know Mac had been thinking about the situation like that. To him, as long as she had a child she would be a mother but apparently she had different views on the subject.

Harm took another step toward Mac only to feel her hand on his chest, stopping his motion. "As much as I would like for you to hold me right now, you're really sweaty." Mac smiled sweetly at him to assure him she was only joking.

Harm turned and walked back toward the waterfall and picked up his t-shirt. He turned back to Mac and made a show of his next action. He removed his soaking wet tank top leaving him topless and absolutely gorgeous, in Mac's opinion. He then took his shirt and used it like one would use a towel. He wiped it all over his body, freeing himself of the sweat that clung to him.

Once Harm was sure he no longer had sweat covering his body, he took a few steps towards the hammock before lying down on it. After he was situated, he patted the space next to him, motioning for Mac to join him. Mac shook her head 'no' then smiled. But once Harm stuck out his lower lip in a pout, she relented and walked over to him before lying down next to him.

Mac lye on her back with her hands on her stomach while Harm lye on his side, one arm propping up his head and his free hand resting with Mac's on her belly.

It was strange to Mac, how they could go from arguing one minute to cuddling together the next. Before they ventured into the 'dating' aspect of their relationship, every time they argued they spent days and weeks being mad at each other. But now, this being their first fight since becoming official, as soon as they were finished arguing they were back to normal.

Mac looked deeply into Harm's eyes, searching for the reassurances she told him wouldn't help. Along with those reassurances, she also found concern, love, loyalty; all the things she knew were there for quite some time but never really looked for.

"I'm scared, Harm." Mac felt Harm's hand move to her side while he held her firmly to his chest.

Harm kissed her forehead softly then replied, "You don't have to be scared, Mac. I'm not going anywhere."

Mac closed her eyes and swallowed the lump forming in her throat. She didn't want to ruin their newly found moment but this was one other fear she had to rid herself from in order to feel truly happy.

In a voice just above a whisper she spoke. "You keep saying that but there's still this part of me that thinks you're going to get up and leave to find someone who can give you the child that you want. The one with her looks and your brains."

Harm took his thumb and brushed it lightly on her cheek. "The only child I want to have her looks and my brains is the child that we could have." Mac opened her mouth to correct him but he silenced her with his finger.

"I know what I said Mac, and I meant it. I know the thought of never being physically capable of bearing a child is hurtful to you. But it's hurtful to me too." When Mac looked at him skeptically, Harm continued. "I would've loved to see you barefoot and pregnant, Sarah. To be there for your first doctors appointment. I wanted to be able to hold you in my arms and talk to the baby in your belly, tell her everything about her parents and the world."

Harm opened him mouth to continue but stopped when he noticed the smile forming on Mac's lips.

"What?" Harm crinkled his brow. What they were talking about was anything but funny.

"You said 'her.' You said you wanted to tell 'her' about things." Mac's smile became full force once Harm removed his finger from her lips. "You wanted a girl?"

Harm smiled fully in return. "I do want a girl, Mac." Harm kissed her gently on the lips before they settled into the hammock, each telling the future they imagined for themselves and enjoying the peace they felt with each other…