A/N: A little later than promised, but here is the new story :) For those of you who read Dark Days Ahead, this will not be nearly as long. I hope you all can still enjoy :)

Kara woke up to an empty bed, and felt her heart break all over again. She had just lost Mon-El, and felt that fresh guilt weighing down on her. Kara slowly got dressed and got ready to head for the DEO. Recently, there had been some Cadmus activity, so all agents were on high alert.

She was at least excited that tonight was Sister's Night. Alex had bailed on the last month of sister nights, but Kara couldn't blame her because she had just gotten engaged with Maggie. Kara just wanted Alex to be happy, and if that meant spending more time with Maggie, Kara was not opposed to it. She did admittedly miss her big sister, though.

Alex promised that she'd clear her schedule today for Sister Night, so Kara was excited about that. She flew to the DEO, and headed toward Alex's lab, quietly knocking before stepping in. "Hey Lex! Do you want Chinese or pizza tonight? I was thinking of ordering ahead of time so that you could have that ready to go as soon as you left the DEO. Oh, and also what movie should I set up? Snapper gave me a day off today, so I'm good to set up for tonight."

Alex apologetically shook her head to her sister. "I'm so sorry, Kara. Maggie and I set up a date night for tonight. But, I'll be sure to make it for next week, okay? I'm sorry it didn't work out."

Kara felt the crushing weight of disappointment in her chest, but tried not to let any of it seep outward. She didn't want Alex to feel bad for spending time with her fiancee. She just plastered a fake smile on her face, and cheerfully responded. "It's no problem at all! Don't even worry about it. Go have fun with Maggie. We always have next week."

She then turned and walked out before Alex could see the tears pooling in her eyes.

Kara returned home, and sank in her own misery.

Feeling like she'd be alone forever.

-00-

The following week, she had an extra bounce in her step. Alex had promised a sister night tonight, and Kara was finally going to get to spend time with her. Since Mon-El, Kara had been feeling so alone. She wanted to say something to Alex, but wanted to let her focus on her recent engagement. She was just excited that she'd finally be able to spend some time with her big sister.

Alex ran into her in a hallway at the DEO, and smiled at her little sister. Kara gave her a quick hug. "What time are you going to be over tonight? I want to have all the food and stuff ready for you when you get there."

A flash of sorrow came across her face. "Oh my God, Kara! I'm so sorry, I totally forgot that tonight was sister night. I arranged with Maggie to help her on a case tonight. I am so, so sorry. I'll make sure I'm good for next week. I can't bail on Mags tonight, it's important. I'll make it up to you, I swear."

Kara felt the same crushing weight of disappointment weigh on her heart, as she tried not to let it affect her too much. "Yeah, it's okay. Go be with her."

She turned and walked away, flying back to her empty apartment. Alex watched her go, feeling guilty for forgetting. She shrugged, and thought to herself that they'd be good for next week, so there was nothing to worry about.

-00-

The next four weeks continued like this, with Alex constantly forgoing plans with Kara to be with Maggie. Kara tried so hard not to let it get to her, but she couldn't help it. Without Mon-El, she felt so isolated and alone. She stopped talking to Lena and James, and rarely ever saw Winn unless it was at the DEO.

She threw herself into her Supergirl duties to try and forget. Forget about how Alex was replacing her with her fiancee. Forget about how no one was there for her. Luckily, there had been a lot of activity to keep her distracted, but there was always a lingering sense of desperation and disappointment in the back of her mind.

Cadmus had been pretty active lately, taking advantage of the chaos left in the wake of Rhea's invasion. They were enough to keep Supergirl busy for the time being. Truth be told, Kara had been feeling abandoned by Alex for a long time now, even though she promised that she'd never abandon her sister.

She started feeling this way around her earth birthday, and since then, that lingering feeling has never left.

Alex rarely ever talked to her at the DEO, they didn't go on missions together anymore, and Alex didn't even come over for sister nights. They never texted, and Kara felt them drifting apart. Any time there was a mission, Alex always took Maggie as her partner. Any time there was a sister night, Alex always seemed to have plans with Maggie. Any time they were at the DEO, she was always joined at the hip with Maggie.

Kara just couldn't take it anymore. She had sent away the only person aside from Alex who made her feel whole, and now she had no support system to help her get over that emotionally. Alex had promised to be there for her, but after her impulsive proposal, she never followed through. Kara was left to deal with all of that hurt on her own, while Alex chose time and time again to neglect her.

After Alex had turned her down again for sister night, she decided that she would talk to her about how she was feeling. The day at the DEO had finished, and she was exhausted from the day's events, however she really wanted to sort this out with Alex.

She flew over to her apartment, and knocked on the door. Alex opened it, and a surprised expression overcame her face. "Kara! I didn't expect you to come here." She gestured for Kara to step inside. "If I had known you were coming over, I would have cleared out the place. Maggie's here too, we weren't really expecting visitors."

Kara sighed. "That's fine. I just wanted to talk to you."

Alex looked at her questioningly. "About what?"

Her little sister looked towards the floor, almost ashamed that she was feeling this way. "I'm just... I just miss you, Lex. Every time I try to talk to you, or spend time with you, your attention is always somewhere else." She gave a meaningful glance in Maggie's direction.

Her fiancee stood up to leave. "I'm going to go. Give you two some privacy."

Alex shook her head. "It's fine, you can stay. Anything she wants to say, she can say in front of you too." She then turned her attention back to her sister. "Kara, I didn't know you were feeling this way. You should have come talk to me. I wasn't trying to make you feel like I was replacing you."

Anger flared into Kara's eyes. "Alex, I have asked you every week to come to Sister Night for the past two months. You couldn't find time for me even once? Not even one week? You couldn't spare me one day of your time?" She tried to calm herself down. Kara didn't want to fight with her sister, she just wanted to figure this out.

"I didn't talk to you sooner because I wanted you to spend more time with Maggie. The night I sent Mon-El away, I told you that all I wanted was for you two to be happy together. But you've completely left me alone. You've abandoned me, Alex. I was left to deal with sending Mon-El away, all on my own. I needed you, Alex. And you weren't there."

Alex's gaze softened. "I'm sorry you've been feeling this way. I just wanted to spend time with Maggie. I had just proposed..."

Kara did her best to hold in a snort. "You proposed two months ago, Alex. You're telling me that you've been neglecting me because of a proposal you made two months ago? And this isn't even the first time this has happened. You claim that you're not replacing me, but it really feels like it to me."

Alex felt some heat start to rise. "When have I done this before? I promised you that I wouldn't abandon you, and I kept that promise. I've been there for you, your whole life. Since we were kids."

Kara just laughed. "That is rich. How about that time when the Martians invaded the DEO? On my Earth Birthday. You weren't even planning on celebrating that with me, because you had a concert planned later that day with Maggie. You knew how important that day was to me, and we have celebrated it every year. You couldn't take one day off for me?"

Alex felt like someone had ripped her heart right out of her chest. She thought they had made amends about that. "Kara..."

Her sister stopped her. "Alex, no. Even when Jeremiah turned evil, you pushed me away. You told me I was no longer part of your family, and for what? Because I was suspicious of someone who had spent years with Cadmus? And you never talked to me about that, you never apologized. For all I know, you still don't consider me part of the family. And when I ended up being right, you didn't come to me to talk about it. You drowned yourself in alcohol and went to Maggie instead."

"Kara, I-"

"Or how about when you were kidnapped? Maggie was the one who tried to free the prisoner, and I was the one to stop her. I got your location from Rick's dad, I broke you out of the cell, and I saved your life. But you don't even want to talk to me about that? You stayed with Maggie the whole day. You never even texted me. I didn't know if you were alright, and you sure as hell didn't make me feel welcome to ask. I was the one who abided by your wishes, I made sure he stayed in prison, like you wanted. And the rest of that day, you sat there assuring Maggie you were fine, with no word to me. How do you think I felt?"

Alex felt heat rising in her cheeks. Though Kara was making all valid points, Alex refused to just stand there and take the abuse. "Kara, you talked about wanting me to be happy with Maggie. So when I try, what? You get angry with me? I never meant to abandon you, and I'm sorry if that's how you feel, but I was doing what was good for me. For the first time in my life, I was doing something for the sake of my own happiness. Why can't you just be happy for me?"

Kara scoffed. "I was. I encouraged you to pursue your relationship with her. I told you that the only thing I wanted for you was to be happy with her, and to never let her go. That's why I never brought any of this up. I just wanted you to be happy. But I didn't want to lose you in the process. I feel like I'm nobody to you now. We used to be so close, but you have been pushing me away. I needed help when I made that sacrifice, when I sent Mon-El away. I just needed someone. But you never showed. You never checked in on me, you spent all your time with Maggie. Alex, I needed you. I was suffering, depressed, alone. I needed you. And you weren't there."

Tears leaked out of Kara's eyes as she turned away. "I just wanted you to be happy, so I shoved my feelings aside. I bottled it all up, so you could have your happy ending. I sat alone in my apartment every night, thinking about how I am such a failure because I had to send Mon-El away. Because I couldn't find another way. And I did that all without telling you, because I didn't want you to feel guilty about being happy, while I was spiraling. I did it because you are so important to me, and I thought that went both ways. But I guess I'm just not a priority to you anymore." With that she left out the door, and flew away.

Alex took deep breaths in an attempt to calm herself. She looked to Maggie apologetically. "I am so sorry you had to hear that. She had no right to come in here and blame all of her problems on our relationship."

Maggie sighed. "Actually, Alex. She did. I never saw it before, but I see it clearly now. I'm the reason you've been neglecting her, and I can see how much it's hurt her. I understand you're angry, but try to see it from her point of view, okay?"

She leaned in and gave Alex a quick kiss. "I'm going to go get ready for bed, I have a feeling we have a long way ahead of us."

Alex crawled into bed, completely drained from the encounter. And she wondered if Kara was right.

Outside, Kara was flying home and tears were blinding her eyes. She had finally let out everything that was frustrating her, and in a way, it felt like a weight was lifted off of her chest. But despite that, she felt as if that had been the wrong decision. She felt guilty for pinning everything on Maggie, and she didn't want Alex to feel bad about wanting to be happy.

This whole situation was just a mess.

She was so distracted with everything that she wasn't paying attention to her surroundings. Kara didn't see the kryptonite bullet heading towards her, until it was too late. She was knocked straight out of the air, and came crashing to the concrete. The impact knocked her unconscious, and she was dragged into a van.

Back inside the apartment, Alex and Maggie fell asleep in their bed, none the wiser.

A/N: Thanks for reading, and have a blessed day :)