Author Notes:

This story could be placed in the same universe that my Supercorp fic "You make my heart feel like it's summer (When the rain is pouring down)" and would explain why Lena knows about Kara being Supergirl.

Again, all mistakes are mine (and there are probably a lot).

Lena

Lena Luthor had always thought that there was two Alex Danvers coexisting in this world at the same time, the same way she once believed that Kara and Supergirl were two individual entities that happened to be equally attractive and charming.

She knows Special Agent Alex Danvers. She was actually the first one she met. The then unknown agent had saved Lena's life, in a very impressive way she must say, after Lex had put a price to her head. It doesn't really matter that it was Lena who shot the guy in the end. So, the eldest Danvers sister had remained an unsung hero, until a chance encounter at Kara's changed that.

Bewildered at first, Lena had tried to make sense of the fact that there was an FBI agent in the middle of her friend's living room, thinking about not less than ten different scenarios that could explain the other woman presence. In the end, it had been something simpler that she didn't stop to contemplate.

It was then when Alex Danvers The Sister was born, and it might have been truly the only occasion where Lena has seen both Alex's incarnations at the same time.

From that moment, and until the day that Kara revealed her secret, she had only meet again Agent Danvers. Not many times, though, but enough to get a glimpse at how hard she worked, and admire the fact that she was almost as big of a nerd as Lena herself. A Bioengineering PhD combined with high hand in hand combat and shooting skills is quite impressive, but she had an inkling that there was something more behind the black, skin-tight gear, and the confident stance of the agent.

It wasn't until Kara and Supergirl fused into one that Lena got to meet The Sister again. In an effort to make Lena feel less alone, Kara had started taking her to every coffee place she knew, every bakery, every fast food restaurant, but she also included her to some of their group nights at home, where they spend the time eating pizza, playing games, and watching movies. It's during those nights when she had started to know Alex. She discovered that the eldest Danvers sister was always a bit distant with everyone who wasn't Kara, so she didn't care too much about that trait in particular. Alex was funny, but occasionally, not like those people who need to make a joke of everything, and thanks to their talks, Lena discovered that their shared love for science was more intense than she expected at first. It had been a long time since she'd met someone smart enough (and not evil) who she could enjoy to spend an evening talking with. Kara was lovely, and she wouldn't change her for anyone else, but she seemed lost every time Lena tried to explain her the newest L-Corp project. Alex always seemed interested in every single word she said and, from time to time, she'd even suggest that Lena and Winn should talk and exchange ideas.

But it was through Kara's eyes that she got to truly know Alex. She was Supergirl's personal hero, Alex the sister, not Agent Danvers, and that was clear every time that Kara talked about her. With every story, Kara's eyes sparked, and her sister's name always left her lips wrapped in a kind of love that Lena never thought it could exist. She hears that love when the girl is happy for her sister, and even more when she's worried. There are times when she can hear the guilt in Kara's voice, when she tells Lena how much Alex had to give up for her, about the burden that Alex had to carry on her shoulders since the day Superman decided to bring her a little sister who had just fallen from the stars.

Lena never talks to Alex about those things, but she understands a bit better where Agent Danvers comes from, because she feels the same. Lena knows how it is to feel like you're always second best, and understands the need to always work twice harder because perfect is never enough. But there's a big difference between them, because where Lena knows that her family will never really love her, whatever she achieves, Alex is deeply loved by everyone around her. She just may need a reminder from time to time.

Luckily, detective Sawyer will take care of that from now on.

"You're thinking too hard," Lena turns to look at Kara, who's staring at her funnily, "They're going to realize you've been staring at them."

Kara is right. They are at the DEO after another attack to the L-Corp building (those have been increasing since Lena betrayed her mother), and she's been lost in thought for a while. The young CEO didn't want to think about Lilian, so she focused her attention on Alex, who was at the control centre giving Maggie some details for the police reports. Before Kara took her out of her thoughts, Lena had just realized that she was staring at both versions of Alex Danvers standing in the same place.

That's what she tells Kara.

"I think it's the first time I see your sister in DEO clothes."

"What do you mean? You've seen her before in her gear," Says Kara, confused.

"No, I mean… This is stupid but, in my head, there are two versions of Alex."

"Okay…"

"Do you remember after you told me you were Supergirl, how I said that I can no longer separate the both of you? That now, when I look at you while wearing the suit I always see you? The goofy, potstickers obsessed, Kara you?"

"Yeah." Kara nods and smiles fondly at her.

"That never happened with your sister. She's always been Agent Danvers or Kara's sister, not both at the same time. But today, she stood in front of a bullet to protect me, and now I can't get out of my head that Alex Danvers is someone who does that on a daily basis not because it's her work, but because she cares."

"That worries you?"

"A lot. I like your sister, and she could have been really hurt because of me."

"Welcome to my world."

"This is why I don't get attached to people." Lena huffs, "It's inconvenient and tiresome."

Kara laughs at that and nudges her playfully.

"She likes you, too, you know?"

Lena raises an eyebrow and turns to stare at her. A smirk starts to show dangerously in her lips.

"Does that mean that she would approve if I were to ask you on a proper date?"

And Kara, beautiful, adorable, dorky Kara, in all the glory of her red and blue suit, chokes a little and stares at her dumbfounded.

"Well, uh... I...," Lena thinks how extremely amusing is to watch the mighty Girl of Steel turn into a babbling mess, "You could... I mean… you do that... I mean... You probably have more possibilities to survive that… you know, any of the boys."

And Lena wants to kiss her then and there, because Kara just gave her permission to ask and implied that she would probably say yes, but they're at the DEO surrounded by people, and it's too soon. When she finally kisses her, it has to be perfect.

"But, just in case, " Kara speaks again, more collected this time, "When you ask Alex for her blessing, bring with you a nice wine and make sure that Maggie is near. Better sure than sorry."