Lena Luthor was nursing her third glass of scotch wallowing on her office couch. How could she have been so stupid, so damn careless? Was she so starved for motherly love that she would take it from literally anyone? Lillian certainly did a number on her; maybe the full extent was still to be seen.

The brunette did not know how to let people in, or at least the right way. She either left them completely out (99% of the population), or she let them in all the way. Sometimes she truly wished she could be stone cold persona she projected, however she was only human. Unfortunately, humans were a social species and craved personal contact. Maybe she should just create a couple of AI's and be done with it.

Lena sighed and took a large swig of her drink. Was she seriously considering building friends? Mad scientist here we go. Before she could elaborate further on her personal Frankenstein plans, she heard a thud on her balcony. Supergirl. The second least person she wanted to see right now, only behind Kara Danvers.

She filled up her glass and took the time to compose herself to face the hero.

"If you came here to admonish me for unleashing an alien invasion get in line. I'm already doing a fine job by myself."

The blond just shook her head and entered further into the office. That was when Lena could really see the girl. Head down, slumped shoulders, bloodshot eyes, tearstains and all together broken. She looked nothing like the force of nature the superhero usually did. Defeat written all over her even though she just saved the world for the nth time.

Supergirl pushed a chair so she could seat in front of Lena. She regarded the CEO, the disheveled look, the half-empty bottle. Of course, the woman would be beating herself up for being manipulated by Rhea than praising herself for getting a device ready in mere minutes to save the world.

"I came because I have to talk to you. I owe you some answers."

Lena scoffed. "Yeah, right. Tell me this then, how much does Kara Danvers hates me right now? I literally banished her boyfriend from earth."

"You saved the planet. You did what I should have done. However, I was naive and believed that people could change given the chance. No matter how many times it took. I should have ended this with Rhea a long time ago. Should have recognize the treat she was." The Kryptonian eyes glistened with tears. "Instead I let her manipulate you and Mon-El. Two of the people I care... cared the most."

"So you hate me too for banishing Prince Charming?"

"Rao Lena! I could never hate you. You are my best friend and…. so much more."

Kara looked into Lena's eyes begging her to understand. "I loved Mon-El, I really did, yet I was never in love with him. I could never give to him something that was already yours."

"What are you talking about? We don't even know each other like that." Lena spoke perplexed.

"Don't we tough?" Supergirl said with sad smile. "I know you Lena Luthor and I know that you know me."

The wheels started to turn in Lena's brain, she once had sure she knew who the hero was. She was certain the girl was only befriending to keep a close eye on a Luthor. A clever plan she must admit, but the further into their friendship they got Lena discarded that hypothesis. Her best friend, the embodiment of sunshine, the woman she would never be good enough for, could never be that cunning. Kara couldn't lie to save her life, yet here they were.

"I'm so sorry." Kara said seeing tears beginning to cloud Lena's green eyes. She reached into the pocket of her suit and took of her glasses and a hair band. She put her glasses on and her hair in a ponytail.

"No, no, no." The CEO clasped a hand over her mouth in shock as her heart sank.

Indeed in front of her stood a broken Kara Danvers fidgeting with her glasses in a Supergirl suit. Did she really know this woman? How much of their friendship was true? Lena was beyond angry; with herself for letting her feelings get the better of her when it came to the Kryptonian, at Kara for the betrayal. They had spent so much time sharing secrets, laughing together, hell they had even flirted!

"How could you?" Lena screamed at the alien in front of her. "Was it fun to play double agent with a Luthor?" She continued throwing her glass straight at the hero's face. "Was it fun to toy with my feelings?" This time her scotch bottle hit her target.

"It wasn't like that." Kara whispered beaten; glass shards all over her now damp hair and face.

"What was it like? Huh? Tell me!" Lena was blinded by rage; the last person she thought would hurt her had just stabbed her. Et tu Brutus? She loaded the gun that resided in her purse. "Look at me and tell me how it felt to lie! Look at me! You made me fall in love with a fucking lie."

The superhero just hung her head in shame.

"I hate you, I hate you!" Lena wailed after every bullet was shot into steel skin, as if shooting the lies away. When her barrel was out, she collapsed on the ground. She just shot her lying, conniving best friend who she happens to be infatuated with, her mother would be proud.

"Are you done?" An unharmed Kara asked with a new resolve in her voice. The only answers she got were empty green eyes staring at her.

"I know I should have told you sooner. Rao, even your mother knew you would hate me for it; but I was selfish." Kara said getting up to scoop a struggling Lena from the ground and lowering her safely at the couch.

She took her sit again sighed. "You were my oasis, my safe place. You were the only person in my life who was interested in me and not in what I could do. You saw me, not Supergirl, not the girl who tried so hard to be a wallflower. That was breath of fresh air I didn't even know I needed. So yes, I was selfish; I made a mistake and hurt you for it. I just couldn't stay away from you and I knew the moment I told you everything would change. I just wanted one solid thing in my life and you were it."

"You don't know how I would've reacted; you took that chance away from me." The CEO spit bitterly.

"Exactly! I could not risk losing you!"

"Do think so little of me that you thought I would have shunned you for being who you are?"

"No, of course not. However from experience, there are four standard reactions when people discover I'm an alien. 1 they fear me and want nothing to do with me, 2 they are curious and want to run tests to see how I work, 3 they accept me and want to take care of me like a stranded puppy."

"What did you assume? That I would fear and want to experiment on you because I'm a Luthor?"

"For fucking sake Lena we've been over this a million times! I DO NOT CARE ABOUT YOUR FAMILY! You are your own person and that's it." Kara raised her voice in frustration.

"Hum, should have pegged you sooner." Lena laughed sardonically. "Lightning doesn't strike twice. Two people defending a Luthor, that would be a miracle, or a joke. Although, you didn't really trusted me did you?"

"I didn't want you to get sucked in into this Supergirl thing. You were mine, only mine." Kara answered whispering the last part.

"You're incredibly presumptuous to think I would be sucked into anything." Lena said arching an eyebrow.

"I'm not as oblivious as people like to think. My sister dedicated her life to protect me, my stepfather got captured by CADMUS to keep me safe, Winn is now a DEO agent, James parades around as masked vigilante. There are two common denominators here, danger and me. You already have enough problems as it is, I didn't to add."

At that, Lena paused and examined the distressed hero. Although very misguided she could see the twisted logic behind Kara's words. After all, she was also Lena's go to person, the one that didn't want anything out of her. The problem was: how she could trust this woman after she hid such an important part of herself? Hell, she may not even know her real name. That was a startling thought.

"How can I trust a word of what you are saying Supergirl? I don't even know your real name."

"Kara Zor-El."

"How can I believe that?" Lena pressed.

Kara was getting impatient she needed to get Lena's trust back, at least a fraction of it. She huffed and thought how she could prove herself. On Krypton, it was so much easier…

"A sacred Kryptonian vow."

"A what?"

"You know for a fact that I'm Kryptonian right?"

"Yes, of course I do…"

"Then research your brothers archives later if you don't believe me, or ask Alex, Rao even Kal-El if you want to. A sacred Kryptonian vow can only be taken once a lifetime, and no Kryptonian has ever broken it. It supposed to bring doom and darkness from the light of Rao if broken."

"Suppose I believed that, what would you even vow to?" The brunette challenged.

Kara straightened her back, wiped the tears and scotch still wetting her face, took a deep breath. When she was ready, she stared unflinchingly at Lena's green orbs.

"I Kara Zor-El, heir of the noble House of El, invoke in Rao's light the sacred vow. I vow to always tell you the whole truth Lena Luthor. May the shadows descend upon me if I ever break this vow."

"So what? Now you're contractually obligated to tell me truth?" Lena smirked.

"Basically yes."

"Anything?"

"Anything."

"Why did you lie to me about being Supergirl?"

"I never lied. I just never told you. I've told you my reasons, I was selfish."

"Tell me about your family." Lena asked, testing the limits of this vow.

"You already know the basics. My parents did die in fire when my planet exploded. I was 13 and sent to earth to protect my baby cousin Kal-El. My ship got knocked out of course. I stayed in the Phantom Zone, a place where time doesn't exist, for 25 earth years dreaming about my last day on Krypton. When I got here, my cousin had already grown up and became Superman. He didn't need me or wanted to deal with me. Two scientists Eliza and Jeremiah Danvers, a DEO agent, adopted me when I was 13. Their daughter is my sister Alex and that's how I became Kara Danvers."

"Wait, that makes you 51 years old."

"Yes, chronologically it does."

"Why did you became Supergirl?"

"Alex was on plane that was about to crash, I couldn't allow it. It all snowballed from there. Thank Rao I now get to use this powers for something good other than repressing then every single second."

"You didn't have your powers on Krypton?"

"No. I was normal. We were a humanoid race that was thousands of years scientifically ahead of Earth. Our God, Rao, is our red sun. Turns out that when exposed to the radiation from a yellow sun we get these powers as a side-effect."

"Why?"

"I don't really know. On Krypton, for centuries we improved genetically the DNA of our offspring. I think along the way it changed how our cells react to certain levels of radiation. I'm basically a solar battery."

"Did you love him?" The CEO finally blurted.

"Mon-El? Yes, I did."

"Were you in love with him?" Lena asked, voice wavering.

"No. I already told you so."

That answer seemed to trigger Lena's dormant anger. She got up from the couch – with some difficult – and stared Kara down.

"No! You. Do. Not. Get. To. Do. This! First, you lie to me, than I shoot you, you take an odd oath and now you want to say you have feeling for me? Hell no. I waited so long for this, but now! It's too damn late and fucking complicated! Go rebound anywhere else; I don't care what you do as long as I don't see you." The brunette said dismissively.

"Lena we need to talk about this." Kara pleaded.

"It's too much Kara. The world was almost conquered because of my stupidity, Lillian of all people tried to save me, and with you being Supergirl. I can't take it."

"Just go Kara." Lena said with a final tone and went to fix herself another drink from a new bottle. When she turned back, Kara was not there anymore, only the broken glass pieces in her place.

-/-

A week later Lena was trying to get back to her routine. She was swamped with crisis meetings about her transportation device. Her mind would not cooperate with her busy schedule always going back to a certain alien. She was in the middle of writing yet another letter explaining why she destroyed what could possibly be the next huge technological leap when she hear the familiar thud on her balcony.

She opened the door to send Kara on her way but before she could say a word, the blond beat her to it.

"I know you don't want to see or talk to me. I respect that, but I had to say goodbye. I'm going to a place where I can learn how to be a better person and a better hero. It doesn't exactly exist on this realm so I made you this com." Kara said putting an envelope on the ground. "I was told that you would be able to reach me with this. If you ever need me, I will be here, I made you a promise and I intend to keep it."

The silence was thick between then. Too many questions, too many answers. They could only stare at one another. A light wind reveled a figure hovering a few foot above then.

"Well, my ride is here. There's a letter on the envelope if you're interested. Take care Lena." Kara smiled sadly.

Lena watched as Kara reached the figure on the sky and then flew away from National City, from her life.