Kara looked around her new office that Cat Grant had just given her. It was blank with no windows, but the hallway just outside did have a door leading to one of the balconies on the building that allowed employees to eat outside without having to leave the building. It was perfect. It was almost as if Cat knew she was Supergirl. A secluded office with easy access to the outside. Kara smiled and shook her head before unpacking her belongings.

"Wow, nice office Kara." Winn smiled as he peered into the office, large grin on his face. "I'm surprised Cat gave this to you."

"I know." Kara was still in a light state of sock. She'd spent the last two years of her life devoted to one of the most powerful women in the country. She wasn't sure what to do with herself now.

"I'm glad you're moving up and that she sees the potential you have outside of being her handmaiden." Winn snarked, moving to help her unpack her things. "I can also get a work order started on getting you a few more pieces of furniture for in here."

"That would be great Winn." Kara beamed at her best friend. "Maybe a chair for if someone visits and a nice char for me too. Maybe a bookshelf. Oh, and a plant. A plant would be really nice."

"Not to mention some pictures. No offense Kara, but this place is kinda dull."

Kara was busy digging in her box of belongings to notice that her and Winn weren't alone. Her mind was racing with dozens of ideas on what to do with her new space and what she wanted to do within the company. She had three days to figure it out. Winn's elbow in her ribs made her look up. Standing in the doorway was someone she never thought she would see again.

"Barry!" Kara quickly moved to hug the man in front of her. He looked exactly the same in dark slim fit jeans and white tee under a dark blue flannel shirt. He had a big dopey smile on his face and his eyes were bright with laughter. Feeling him hug her back was the best thing in the world, the happiness in her nearly drowning her. It was just like the last time she saw him, only happier.

"What are you doing here man?" Winn came up and fist bumped the fastest man they had ever met. Kara moved back, putting an acceptable distance between her and Barry. It was the last thing she wanted though. She wanted to curl up in his arms and enjoy having him back in her life, no matter how long he was back.

Kara didn't admit it to anyone, and barely admitted it to herself, but she had missed Barry terribly when he left. It was like he had taken part of her with him to his Earth. She had never met anyone like him, a hero who knew what it was like to be a hero, who was remotely close to her age. Kal and J'onn were the only two that she knew about. Barry, and his alter ego the Flash, had made her foolish heart want something that she knew she couldn't have. Kara, however, had gotten good at hiding her feelings over the years. She swallowed her half formed dreams and moved on. Now Barry was back, and Kara had a feeling that it might not be a good thing.

The grin on Barry's face dropped, showing them the severity of the situation. Winn looked at Kara with concern, a knot forming in her stomach.

"Is there somewhere we can talk?"

The DEO was the only place Kara could think of that would be secure enough for them to talk. Winn, much to his embarrassment, was being carried bridal style by Kara as she flew to the base outside National City, Barry zipping along on the ground below her.

"Remind me why I had to come again?" Winn asked Kara as they approached the base. His arms were crossed, holding his tie down from slapping her in the face. With a grin Kara rolled her eyes.

"Because, I may be smarter that the average human, but Barry is a genious and I need my own super nerd to help translate things I don't understand." Kara laughed changing trajectory to land softly on the ground and set her friend on his feet. "Besides, how could I deny you the opportunity to fanboy over your second favorite superhero?"

Barry appeared next to them, kicking up a cloud of dust in the process.

"You've gotten faster Girl of Steel." Barry snarked at her as Kara punched in the security code. She blushed at knowing Barry paid attention to her. Even his tone was different, lighter than it had been the last time she heard him call her that.

"No, you've just gotten sloppy Scarlet Speedster." Kara teased right back as Winn made a quick dash inside, ducking into the commissary to grab a bottle of water. Barry slid closer to her as they walked through the underground tunnels to the command room. Kara's heart raced, but she wasn't entirely sure why. It could be adrenaline from flying, the concern as to why Barry was in her Universe, or it could be Barry himself. He was walking close enough that his hand would brush against hers, and even through the TriPolymer of his suit, she could feel the electricity radiating from him.

"Flash!?" Lucy looked up from a console, surprise written on her face. "I thought you had gone back to your own Universe."

"I did commander, but something happened." Barry's voice was gruffer as he pulled his cowl off. A flutter went though Kara, secretly loving the way his hair was all messed up and the shadow of a beard on his strong jaw. Then a chill raced down her spine at his words.

"What happened?" Kara asked as Barry requested use of the console Lucy was at. With a nod she moved aside, knowing that he wouldn't harm anything.

"Supergirl!" A strong female voice demanded, making the caped woman turn. Coming from another branching tunnel Alex and J'onn, in the form of Hank Henshaw approached her, Winn following behind.

"Who is this?" Hank asked crossing his arms. Barry zipped in front of the alien in disguise and held out his hand.

"Barry Allen, fastest man alive. Also known as the Flash."

"Nice to meet you Mr. Allen." Hank surprised Kara and Alex, shaking the young man's hand.

"Call me Barry." After shaking Alex's hand he zipped back over to the console. The agents had learned from his last visit to have all loose papers held down with paperweights. Alex moved to stand beside her sister, Winn having already claimed one side. The martian followed Barry to the console and looked over his shoulder as the man in red typed furiously.

"So this is the Flash you told me about." Alex smirked, speaking softly and knowing her sister would hear her easily.. "I haven't seen you this gobsmacked since you first met James."

"She's actually more gobsmacked this time around Alex." Winn added, having been able to hear her. "You should have seen our little alien light up when she saw him at CatCo."

Kara blushed as red as her cape before deciding to get back down to business before Barry saw her face.

"Not now you two. There is a reason Barry is here, and it has to be something major for him to not want to talk about it at CatCo." She then projected her voice to the man who was sitting a few feet away.

"What's going on Barry? It sounded important." Kara moved to look over his shoulder. On the monitor in front of them was a map of the United States as well as a frequency meter. As they watched the map changed, new cities popping up on the map where there hadn't been any before.

Barry spun his chair around, glancing at Kara. His green eyes were dark and troubled, just like they had been when she first met him. She had a sinking feeling in her stomach, and she slowly moved to sit in the empty chair beside him. Lucy, Winn, Alex and Hank gathered around while the rest of the agents continued about their business.

"When I accidentally opened a breach to your world several weeks ago, something happened. I opened a gateway, a tear in the dimensional barrier." Barry rested his elbows on his knees.

"Yes, but when you went back, didn't that close the tear?" Winn asked. "It should have sealed over and returned to like it had never been there."

"Normally it would have." Barry nodded running his hand through his hair, spiking it up. "The other times I had jumped to other Universes they sealed once I came back through."

"I thought you had said that you had never jumped the breach before." Lucy injected.

"After I got back to my Earth I knew how to jump worlds, and had to do it to chase one of our rouges down. The last few weeks have been rough." Barry sighed and Kara reached out to rub his shoulder, unable to not touch him. He glanced at her and quirked her a smile before continuing.

"I didn't try to rejump to this Earth. I was sure that the dimensional barrier has healed over and wouldn't let me though. I was wrong."

Kara didn't know what to do, this was something way beyond her scope to fix. As it was she was barely wrapping her head around the whole dimension hopping that her friend could do.

"For some reason, this gateway kept growing over the last few weeks. Have any of you noticed any weird electrical anomalies?" When everyone shook their heads Barry turned back to the keyboard and continued typing. The frequency meter started spiking and dots popped up all over the map. "I tweaked your settings and there has been activity, you just didn't know what to look for. As you can see, everything is changing."

"What's going on Barry?" Kara asked, concern racing along her nerves. Her stomach bottomed out when he shook his head and looked at her, face grave. Behind her she heard Winn,

"Oh no. It happened, didn't it?"

"What? What's going on Kara?" Alex demanded, but it was Barry who answered,

"My portal didn't close. It opened wider, encompassing the whole of this Earth."

"Does that mean-?"

"Yeah Winn. Your reality has joined with mine. I pulled your Earth into harmony with mine. We are now in the same Universe."

Let me know what you think. This was an idea I had in my head. I'm not even sure if it's anything I should continue or leave up. I have actually never watched Flash or Arrow, but I've seen every episode of Supergirl. Forgive me if some characters seem OOC. I've always loved the idea of Kara and Barry together.