"You're leaving?" the six year old frowned looking at Mon-El, fresh tears in her eyes when she saw her best friend nod. "Why?" she asked with tears in her eyes, the daxamite kneeling in front of her.

"Remember what I told you about being a hero?" he asked making her nod. "I have to go back to the future, sweetheart, I'll be back soon, okay?" Mon-El embraced her, so she couldn't avoid crying while hiding her face on his shoulder. "I'm gonna miss you, kiddo" he whispered kissing her hair.

She just stayed still, with her face still hiding as she gripped his t-shirt not being ready to let go of him, sobbing loudly when she felt that Mon-El was pulling away from her, her cousin taking the chance to pick her up.

"I don't want him to leave" she whispered resting her head on Kara's shoulder.

"I know, baby, but he has to" her cousin told her before kissing her forehead.

He had to. Those words were being repeated in her head all the time, tears still streaming down her cheeks as her cousin tried to calm her down, but she wasn't okay with Mon-El leaving again, she didn't want to lose her best friend for the second time.

He didn't have a choice, he was a hero in that time and she couldn't make him stay and left all those people who believed in him, in the Legion of Superheroes, all alone with none who would protect them.

However, that didn't make things easier because despite the reason, he was leaving anyway, but she hoped that he would return soon.

She spent the day playing with Winn at the DEO while everyone else was still working in Reign's case, but at that moment she was sitting in one of the chairs observing how they were trying to make a plan about how to stop the Worldkiller.

"We can't use the kryptonite, you're still injured" her cousin commented looking worriedly at J'onn.

"There is no other choice, Kara" he shook his head.

"Actually, there is" Mon-El said entering in the DEO, which made her to look at him for a few seconds before running towards him to hug his legs. "Hi, kiddo" he smiled picking her up.

"You're back" she couldn't avoid smiling while pulling away a little from him.

"I'm going to stick around for a little while" he told her as she hugged him again, hearing her cousin's laugh, who approached them.

"Halley, baby, we need to leave, after that you can hug Mon-El as long as you want" her cousin told her as Mon-El left her on the floor.

She watched how they leave the DEO while the feeling of being afraid of her cousin's safety was beginning to appear.

Everytime, ever since that night, Kara left to fight Reign, she had that bad feeling that something would happen again, even though her cousin would always tell her that everything was going to be alright, but the anxiety of not knowing what was going to happen was one of the worst feelings at all.

"Hey, hey, it's okay, sweetie" J'onn whispered crouching down to her height as she snapped out of her thoughts.

She had been breathing with agitation, her hands clunching into fists as tears were starting to fall down her cheeks.

She always had that fear of being left alone, ever since her mother's death, she knew that it was really simple to lose someone you cared about, that it only took a few seconds and then, the other person would be gone forever, so that was the reason why she couldn't trust her cousin's words when Kara promised her all the time that she would be back.

J'onn grabbed her hand to bring her to a different room, place where she waited for her cousin to come back while coloring some drawings.

"Hey, baby, What are you doing?" she turned her head to look at her cousin. "You're ready to leave?" Kara asked as she glanced at Mon-El.

"We can't stay a little longer with him?" she asked approaching them.

"Umm... We have to go to Alex's loft, but he's not going anywhere, we will see him tomorrow, okay?" her cousin told her to what she nodded.

"She's right, kiddo, we'll play tomorrow, okay?" Mon-El ruffled her hair as she grinned.

Shortly after that they left to Alex's loft, her hand gripping her cousin's tightly while they walked inside the elevator.

"Hold the door, please" someone asked, so her cousin reached out to hold it.

"Lena" Kara exclaimed when the woman stepped inside the elevator.

"Kara, you are a sight for sore eyes" her cousin's friend whispered while hugging Kara. "Hi, there, sweetheart" Lena ruffled her hair.

"What are you doing here?" her cousin asked.

"Ah, visiting Ruby" Lena answered. "I-I didn't know what to bring, so I-I brought ice cream." the woman said pointing to the bag that she was holding.

"That's a lot of ice cream" Kara laughed.

"Did you hear what happened?" her cousin's friend asked making her to look at Kara kind of confused.

"Yeah, I did" her cousin whispered. "What an awful day for her" Kara commented. "Alex tells me that you're helping Supergirl fight Reign. I'm sure she's so grateful for your help" she could see her cousin smiling a little bit.

"Well... frankly, I am only working with Supergirl to save Sam because I have no other choice" Lena said as Kara frowned, looking at her friend questionly. "it's that old adage. "Never meet your idols", you know, "it'll only lead to disappointment"" the woman explained as her cousin nodded slightly. "Supergirl's not all truth and justice like she pretends to be. You know, she had James break into L-Corp and search my private vault?" her cousin's friend asked her, making her to look at her cousin observing how sad she was about hearing Lena's words.

"I'm sure she had a really good reason" Kara tried to defend herself, but she could feel her cousin tightening the grip.

"Of course, James didn't do it" Lena's said to Kara's surprised. "Well, no. We've been dating each other for months. He knows me, and he trusts me, and I trust him. Supergirl went behind my back, and used my personal relationships against me. That's something my mother would do. She crossed a line. I can never trust her again" those last words broke her cousin, she could tell that Kara would end up crying if that conversation wasn't over soon.

She tugged from her cousin's hand wanting to get her attention, so Kara would focus in other thing, but her cousin seemed to be deep in her own thoughts without even realizing that Lena had already walked out of the elevator.

She wrapped her little arms around her cousin's legs, getting Kara to look at her for a few seconds before both of them walked into the hallway, moment in which her cousin picked her up to embrace her as tight as possible.

"I'm sorry" she whispered looking directly into her eyes.

"It's okay, baby" her cousin smiled softly at her. "I love you, baby girl" Kara kissed her forehead.

"I love you, too" she smiled back.

Kara had managed to convince her to stay with Alex while her cousin and Mon-El were going somewhere to try and find a substance that might separate Sam from Reign.

However, the fact of not knowing where she was going or how long it would take, was getting her a little nervous.

She shook her head when her gaze focused on a black shadow, her heart beating as fast as possible because of being afraid of discovering what it was.

"Alex!" she screamed the moment her eyes locked with the demon in front of her, tears streaming down her cheeks.

"Hey, hey, What's wrong?" the agent approached her, but she didn't find the words, just pointing to the place where the demon had been before.

It wasn't the first time that happened so Alex understood what she was referring to, because her cousin's sister just picked her up to calm her down, her head resting on the woman's shoulder as her whole body shivered.

Everything had been better, she hadn't have more nightmares for a long time, so she was staying with her cousin again, but being able to see a demon wasn't a good sign and she knew what it could mean.

"Ruby is getting ready, What do you think if we go to the park?" Alex asked her, pulling her away as she nodded. "It's okay, kiddo, they're not coming back" the woman kissed her forehead.

The three of them went to the park, where she played along with Ruby, neither of them wanting to leave when Alex told them that they were leaving to have lunch.

She felt how one of her front teeth fell out while bitting the hamburger, a little hole between her teeth as she put her hand in front of her mouth to spit the little tooth that was in her mouth covered in blood.

"Alex?" she called the agent, her voice trembled, getting the woman to look at her and smile.

"Oh, kiddo, you've lost your first tooth" the woman said as she tried not to panic, Was it normal?

"Is it because I haven't brushed it correctly?" she asked, her cousin used to tell her that if she didn't brush her teeth, they would fall.

"No, no..." Alex laughed at her question. "That was a baby tooth just as the rest in your mouth, you're going to be loosing them as they get replaced by new ones that will always be in your mouth" the woman explained her, making her frowned not really understanding it, Was she going to lose every single tooth?

"What do we do with it?" she questioned observing how tiny it was.

"You have to put it under your pillow tonight, so the Tooth Fairy will come and take it, in return she gives you money or a little toy" Ruby told her, to what she looked at the teen surprised.

"Alex, Can you keep it safe for me?" she asked her cousin's sister, who nodded taking the little tooth to wrapped it with a napkin and put it in her jacket's pocket. "It's kind of weird" she commented pushing her tongue through the tiny hole, getting Alex and Ruby to laugh.

They spent the afternoon playing board games at Alex's loft, growing impatient for her cousin to come back, because, even though they didn't know how long it would take, Kara had told her that they would be back by evening, but it wasn't what was happening.

Her face lighted up when she heard the doorbell, really hoping to see her cousin at the other side, so when she did, she couldn't avoid running towards her to hug Kara's legs.

"Hi, baby" her cousin hugged her back. "Did you have fun?" Kara asked her to what she nodded.

"Halley, kiddo, smile" Alex told her, so she did, finding surprise in her cousin's face.

"You've lost your first tooth, that's so cool" her cousin exclaimed.

"Ruby said that we have to put it under the pillow, so the Tooth Fairy will come" she explained her cousin with so much excitement.

"That's right, we have to" Kara tickled her while laughing.

"How was it?" Alex asked Kara, who smiled.

"Pretty good, It's just... I can't believe that she's alive after all these years" her cousin answered really happy.

"You want to go back?" the agent questioned as her cousin shrugged her shoulders.

"I... Maybe" Kara finally said getting her to look at her kind of confused, not understanding what they were referring to. "We have to leave, sweetie" her cousin told her while grabbing her hand.

She said goodbye to Alex and Ruby before leaving with her cousin at whom she looked from time to time trying to understand the conversation the Kara had had with her sister, Where had she been?

Once they were at home she put her pajamas on while her cousin ordered some Chinese food, so it wasn't until they both sat down to have dinner when Kara seemed to want to explain what had happened that day.

"You know we went to a place looking for a rock to separate Sam from Reign, right?" her cousin asked her, to what she nodded. "Well, we found that rock at Argo, the city survived Krypton's explosion" Kara said making her frown. "My mother, your aunt Alura, survived as well as so many more kryptonians did..." her cousin explained as she interrupted her.

"That's where you wanna go, right?" she asked still a little bit confused by everything.

"Yeah..., I would like for us to go there for a while" her cousin answered caressing her face.

"But... What happen with Alex, Winn, papa, school...?" she questioned kind of upset, she would have to leave everything behind. "I want to visit it, but I'm not sure if I want to live there" she bowed down her head.

"It's not going to be forever, but just a little while so you can learn from the culture and all of that" Kara told her, her voice sounding a little bit sad about her not wanting to go with her. "We'll come back to visit them, okay, baby?" her cousin picked her up to sit her on her lap, embracing her tightly. "My mom gave me this for you, she really wants to meet you" Kara said giving her a small box, a pink flower inside.

"Dar-Essa" she whispered taking the delicate flower in her hands. "Is Argo like you remembered?" she asked curiously.

"Kinda... Some things are different than before, but others are the same" her cousin answered. "You're gonna love it, baby" Kara kissed her hair.

"I can't wait to go!" she exclaimed excitedly, not being able to believe that she was going to visit Argo, the city she had dreamed about for years.

"Me neither, little one" Kara smiled. "Now, let's go to put your tooth under the pillow, it's bedtime, but remember you have to be asleep for the Tooth Fairy to come" her cousin told her to what she nodded.

She didn't waste time in taking her tooth and putting it under her pillow before getting in bed, her cousin laughing while watching her.

"Have sweet dreams, baby" Kara kissed her forehead. "Love you" her cousin whispered turning off the light.

"Love you, too" she whispered while closing her eyes, ready to dream once more time with the city she would be visiting soon.

Hi!

I know episode 3x20 has a different plot with Alex, but I didn't like it that much, so I decided to change it. I thought it would be more interesting and fun to see Halley losing her first tooth.

Next chapter will be the trip to Argo City and Halley is going to be so excited about everything...

Thanks so much for reading, let me know what you think,

Ayrin