A/N: Thank you so very much to everyone reading this story - it means so much. Special thank you for all the favorites, follows, and kind reviews. You guys make my day! I always enjoy hearing from you wonderful people.

Be sure to keep sending prompts in if you'd like! I've received some really awesome ones and I can't wait to write them. If I get a few more, I'll make a poll on my profile page, that way you can vote the prompt you want me to write next. So, keep an eye out for that. :)

This chapter is inspired by 2's prompt, Kara has disappeared for two months and is presumed to be dead, but she's in Barry's Earth (the deo didn't know that) and returns just in time as Alex is about to get killed by an alien. Then some Kara Alex bonding.

Quick disclaimer - I have only seen a few episodes of The Flash, so I did my best to craft this chapter in spite of that. If anything feels off, please let me know. :)

Alex's heart was beating, pounding against the slick pavement as destruction and chaos rained upon the darkened alley. The air was heavy with humidity and the two other agents sent with her to detain the alien threat had already been discarded by the creature, tossed to the ground a distance away from her. Pain screamed in her side and her head pounded, and combined with their distance, she was unable to determine if they were dead or unconscious.

Her orders were to remain out of the alien's sight until backup from the DEO arrived, so, as the creature sought Alex out, she pressed herself between the street and a dumpster, and tried not to think about the sick feeling in her stomach that tonight could, quite easily, be the night she died.

Backup units were still far, the DEO had been overwhelmed with crises and threats since Supergirl's disappearance two months ago. Violence had wracked the city and the DEO was barely able to keep things under control.

She heard the alien's footsteps clattering against the street as her mind reeled through the events of the previous two months. Kara's disappearance had been abrupt and unpredicted. Everything had appeared normal one evening as she left the DEO, flying off into the night. The first sign of her disappearance had occurred the next morning when Kara didn't show up at CatCo Media, and then failed to attend a meeting with the DEO.

Within a few days the missed phone calls had piled up and Alex was left with no response, only the simple greeting of Kara's voicemail. There were no answers, no leads, no clues, hints, or indications. Just the stark black and white hues of there one day and gone the next. And the long, painful seconds merged and mounded into minutes into hours turned weeks to months.

Alex's thoughts halted, she peered out from a gap between the wall and trashcans, the alien was still temporarily dulled by the earlier shots she'd sent in its direction.

She pressed herself back against the red brick of the building behind her, thinking about Kara again and the days that had stretched by in her absence. Kara was presumed dead and Alex was reminded of it every day—by empty halls in the DEO and quiet apartments and the constant cycle of news playing across every TV screen in the city. Reporters asking the same question Alex asked herself every morning and night and all the time in between: where was Supergirl?

Because despite everything, no one really wanted to believe she was gone. Alex wouldn't – couldn't – believe Kara was dead.

There was a loud crack in the street, reverberating through the ground and shaking Alex to her bones. A few moments passed and Alex saw the alien's shadow approaching. She closed her eyes and moved slightly, trying to shake out the pain shooting from her clavicle to her abdomen. There was no way back up would be there in time.

Alex checked the special gun the DEO had designed, created specifically to target the alien's super strength and penetrate its rubbery skin. The serum's elements were highly concentrated with hopes that it would still be effective despite the alien's large size.

It had worked, at first. Sort of.

The alien had been temporarily stunned, but it was fine now, and approaching Alex. Quickly.

And shit her gun was almost empty.

Alex ran a hand over her face ignoring the pain that radiated through her side. She moved into a crouching position, angling her gun at the creature and sucking in a deep breath.

She only had one shot, but maybe one shot would be enough.

Her heart was a metronome set on high as she curled her finger around the trigger and pulled hard.

On impact, the alien froze, before yanking the injection from its chest and throwing the device. The capsule landed with a clatter, splashing water from the pavement as the alien threat turned toward Alex.

She tossed her gun at its face, hurling the machine with as much force as possible before scrambling from the nook against the wall and into the street. She pushed herself up, slipping against the pavement.

Then a hand was on her body, shoving her down. Gravel bit into her palms and knees. With a kick to her stomach she collapsed and hit the street, tasting blood. Her ears rung and she struggled to sit up.

Another kick sent her back down and the alien towered above her. Alex wondered if Kara had felt the same way facing death. If she had known it was coming.

The agent closed her eyes and felt the creature's breath on her skin, hot and horrid, like it was encompassing her. A slap rang through the air and the feeling disappeared, the cool night air regaining its space around her.

Alex's eyes snapped open.

She saw it. Saw her.

Supergirl. Flying. Supergirl breathing, Supergirl throwing the alien against the ground with so much force that the pavement buckled.

Alex was convinced she was dead and yet, a sliver of hope was eking itself into sunlight.

With wobbling arms she eased herself into a sitting position. Supergirl had defeated the alien, rendering it unconscious with a few sharp, well placed blows.

Meanwhile, Alex raised a hand to her head, feeling around for an injury that would offer an explanation to the things she was seeing; to Kara kneeling over her, gently lowering Alex so her head was cradled in Kara's lap.

"Hey, Alex, are you okay?" Kara asked and her voice was so concerned and so… so real. That Alex felt tears pricking in her eyes because she missed Kara so much.

"Kara?" she choked.

"Yeah, Alex. It's me, it's me. I'm here."

Alex shook her head. "You're dead. Everyone said that you died."

"No, I just… It's complicated. You remember The Flash? I got pulled over to his Earth. It's okay though, they figured out how to get me back here. I can explain more later."

Alex bit her lip and reached out touching Kara's face then moving her fingers to curl around a piece of Kara's hair. A smile cracked across Alex's face and she laughed for the first time in months. "It's really you. Oh my God, it's you."

Alex pulled away and sat up, the ache of her injuries dulled entirely by the relief and jubilance alive in her veins. She tugged Kara into a hug, sinking into the feeling of Kara's heart and the movement of her lungs – filling her with air, filling her with life.

It's how the DEO found them, ten minutes later when back up finally arrived. The sisters stayed close together as medics examined Alex, diagnosing her with a broken clavicle and bruised rib in addition to some other scrapes and bumps.

Alex managed to talk her way out of a hospital visit and the girls found themselves in Alex's apartment half an hour later with pizza and doughnuts.

"I can't believe you're really back," Alex said as she eased herself into a seat at her kitchen counter.

"It's good to be here. I missed you so much. It was crazy," Kara said and took a bite out of her doughnut.

"God, life was terrible without you, Kara. I mean it was awful. Some of the worst two months of my life." Alex put her pizza down and pushed it away, pulling a hand through her hair.

"Well I'm here to stay. Barry still didn't figure out exactly how it happened. I got pulled over with him somehow. I spent every second there try to get back here. I was never going to leave you."

Kara saw the corners of Alex's lips pull downward and she knew her sister was about to cry. Maybe words weren't what Alex needed right now.

Kara slipped from her chair and wrapped her arms around Alex, pulling her into a hug that was simultaneously the softest and tightest embrace Alex had ever felt.

Finally, all at once, every worry, every wound up ache inside her broke out, manifesting in sobs and tears that wet Kara's light pink shirt. The brunette hiccupped and gasped as Kara kissed her hair and rubbed her back.

"I-I never told Eliza that you were gone," Alex admitted. "I hadn't done it yet, because I c-couldn't believe it. I woul-wouldn't believe you were gone."

"And you were right," Kara said with a smile. "You were right and everything's okay."

Alex nodded, pulling away from Kara and making a futile attempt to wipe her eyes. Kara squeezed her sister's hand and tried to hide a yawn.

"Tired?" Alex asked, already moving out of the chair.

"A little."

Alex wrapped an arm around Kara, keeping her close against her side. "Me too."

"Oh, right! Alex, you're supposed to be getting rest because of all your injuries. I promised the medics I'd take care of you."

Alex smiled slightly. "I'm fine. It's no big deal."

Kara rolled her eyes and led her sister to the couch, sitting and curling beside her. "That's ridiculous."

Alex shook her head. The pain meds she'd received earlier were making her languid and fatigued, her eyes drooping as she fought sleep. She didn't want their conversation to end; didn't want to miss a single second of being near Kara. She wanted to spend every moment possible soaking up her sister's presence: her appearance and her voice and her words.

Instead, Alex felt her eyes close as she leaned against Kara and slipped her fingers around Kara's hand, with every intention to hold it throughout the night just to make sure Kara didn't fade away; just to make sure she was real.