That's just what brothers do (and sisters)

Supergirl (TV 2015)
F/F
G
That's just what brothers do (and sisters)
Summary
"I swear to God, if my sister gets hurt you're gonna regret the day you met me.""Oh come on, do you not trust me? And also, if my sister gets hurt, you're getting a frontrow view of those true crime documentaries you love so much.""What the fuck? You're supposed to give the shovel talk not turn into a murderous psychopath."or The AU wherein Lex and Alex are brotp goals and their sisters are fools in love.
Note
Okay, I started writing this because I want to see a Lena/Lex scene wherein they're actually happy and Lex loved Lena like Alex loves Kara. So, yeah hope you like it.
All Chapters Forward

Chapter 1

He finally arrived at the familiar house, he briefly thinks that he has spent more time here than his actual home before jogging the last few steps and knocking politely.

"Oh, Lex! What a wonderful surprise!" The sunny face of Eliza Danvers welcomes him.

"Hi Mrs. Danvers, is uh-is Kara here?" he says, straight to the point stopping himself from pointing out the fact that his visit really isn't a surprise; he was here just 7 hours ago. He took a step inside and let himself in, he's earned that privilege. Eliza was already walking to the kitchen.

"You know you can call me, Eliza. Kara's in the living room with her sister. Dinner's in ten are you gonna stay?"

"I already had dinner. Well, technically speaking I'm supposed to be having dinner, right this moment." Lex says, slowly walking down the hallway to the living room.

"And you chose to grace us with your presence why?" Alex butts in, rounding the corner and meeting Lex halfway.

"Well, Danvers to answer your question I have to talk to your sister."

"Alex, play nice!" Eliza's voice can be heard from the kitchen. Alex tilted her head and gestured for Lex to come into the living room. Where Kara was sitting stiffly at the couch, eyes trained ahead at the evening news but it was evident that she really isn't taking anything in. Lex took three quick strides and put himself in between Kara and the T.V. Before Kara could protest at the sudden intrusion, Lex spoke up,

"Mind telling me why my sister told me she's bringing a girl home--which I naturally expect would be you--then come Monday night, lo and behold there's a stupid brunette--who is all kinds of wrong for her, by the way-- dining in our table?" he deadpans it all impressively in one breath.

Kara sighed and rolled her eyes. "First off, do not call women stupid. Second of all, why would I be having dinner with your family? I'm not her girlfriend, Lex." She says in a sarcastic tone, although Alex caught a small twinge of sadness at the end of the sentence.

"My sister sleeps here 5 days out of 7. Are you seriously saying you two are nothing?"

Kara just supplies a simple, "Yes, Lex."

"Are you kidding me? You just told me two months ago that you were gonna say something. So when my sister announces to the whole family that she's bringing someone home, of course my first thought was you'd show up at the door." Lex retorts, gesturing animatedly. Kara suddenly stands-up, squares her shoulder, crinkle on her forehead and irritation across.

"Well, as you can see, you thought wrong. And what I said two months ago doesn't matter." she grits out, Lex pushes on, "Kara, this is Lena we're talking about-"

"Look, Lex, will you please shut up for a second and listen to me. Your sister does not feel the same way about me alright? She said so herself. So will you please save us all the theatrics and go home before Lillian finds out the golden boy missed dinner to sneak out to the peasants' home?" Kara huffs out in a very un-Kara like manner, her eyes were shining with both anger and unshed tears. Alex stood frozen at the side of the couch taking in the scene between her best friend and her sister.

"Wait-what do you mean, Lena doesn't feel the same?" Lex blurts out, confused at Kara's sudden anger. He just had a talk with her sister, she basically confessed to him that she's been in love with Kara ever since forever. Which makes this whole ordeal really fucking confusing.

"Do you really want me to spell it out for you? Fine. Just so you know we kissed. Alright? I kissed her. During that stupid fundraising event you forced me to go. And then the next morning when I said we should talk about it. She told me it was a mistake, and that it shouldn't happen again and that it should have never even happened in the first place. So, I don't know what you still want from me, Lex. When your sister's taken it all." And with that Kara walks out of the room leaving a stunned Alex and a stuttering Lex, "Wait-what? She said what-Kara, I didn't know-I'm sorry!" But it was too late the slamming of the front door reverberated throughout the entire house.

It was Lex who broke the silence first, "Did you know?" he asks, voice hesitant and eyes unsure.

"No, I didn't know. She didn't say anything. God, how did we miss this?" Alex says exasperated. She knows she needs to go after her sister and maybe even give Lex a bit of a roughing up for making Kara cry. But her head was spinning at the moment and Eliza is peeking her head in asking what the hell had happened.

"There was just a misunderstanding, Mom. I'll go get her." Alex calmly answers. Eliza nods, not bothering to push further or even chastise the people in her living room. God knows how many times this kind of thing had happened in this household. She's learned that it was best to let her daughters sort it all out.

"Come on, tiger. We're gonna find my sister, find out what happened two months ago and you are going to apologize for the damage." Alex instructs tossing Lex his coat and simultaneously putting on her own.

"But I had no idea! If I did then I wouldn't even have brought it up in the first place."

"Whatever, you still owe her an apology." Alex replies, walking out the front door leaving Lex to follow her into the cold night.


Two months ago...

"Remind me again, why I'm here?" Lena sighs out, her heels were killing her and she's really, really tempted to dunk her brother's head on the hot chocolate fountain at the end of the long table, for leaving her alone to flirt with some leggy blonde.

"Because you're a Luthor and you have to keep up appearances, Lena. Hey, look at that my Lillian impression is getting better!" Kara pipes up from beside her, raising her eyebrows as if to emphasize her little victory over mocking Lena's mom. Right, she's forgotten that she was with a blonde as well. But this blonde, this blonde is warmth and happiness and Lena's been fucking in love with her ever since the moment she's set foot in Midvale. Maybe she can dunk Lex's stupid head in chocolate some other time, for now Kara deserves her undivided attention.

"Very funny, darling. Although you should work on saying 'Lena' with a bit more disappointment." Lena shoots back, a playful chastising tone in her voice.

"Ah, but I don't. Because you're never a disappointment, Lena." Kara says sincerely. Had Lena mentioned she's in love with this person? Because she is, almost stupidly so.

Kara was wearing a navy blue dress that accentuated her body so perfectly and made her eyes light up that Lena's knees buckled when she saw her for the first time.

"Want to step out a bit?" Kara softly offers, tilting her head towards the open balcony, Lena nods and lets herself be dragged by her best friend.

The air was a bit cold but Lena refused the urge to shiver. She leaned on the marble balustrade and lifted her head up to the sky. It was a dark blue no clouds in sight kind of night. She reveled in it.

Kara watches on as Lena's neck crane upward, fascinated by the way her muscles moved underneath her skin. Finally, Lena notices Kara staring and flushes a little and asks, "What are you looking at?"

"Nothing, you just-you look really, really pretty, right now." Kara admits sheepishly, she couldn't stop the words even if she tried. Lena's heart is pounding and ringing in her ears, Kara's words always have an effect on her. Well, to be honest? Kara herself had always had an effect on her.

"Flatterer." She deflects instead but then Kara steps in her personal space and settles her hands on Lena's hips.

"It's true." Kara whispers and Lena feels like she can't breathe. She doesn't even know how she finds the courage to move her lips.

"Well, I guess it's only fair to say that," Lena pauses and Kara's eyes are trained so intently on hers. "Kara Danvers, you are absolutely breathtaking."

She watches Kara's eyes glaze over and then-

Kara's lips are on hers and she's trailing her hands up to cup Lena's face to kiss her more deeply.

Lena's heart and brain was in a frenzy and her hands are braiding themselves at the back of Kara's head and they're pressing closer and closer.

Kara pulls away for a second but Lena's lips chase hers and Kara leans in for another.

This one is calmer somehow, just as intense and just as deep but not as frenzied.

Lena finally opens her eyes when their lips pull apart. Their faces are just inches from each other and Lena's feelings are bubbling over the surface, boxes upon boxes haphazardly crashing down. She wants to say something, anything to clear whatever it is that just happened. But then a large round of applause and cheers break out from the ballroom unto the balcony; breaking the bubble the both of them were in.

The noise was like cold water being dumped on the both of them. Lena immediately sobered up from Kara's intoxicating presence. All of a sudden it wakes her up. This is it, this is why this is so wrong. No matter how right her heart screams it is. Lena belongs in a different world, in a world of stinging scorpions and disappointed mothers, a world of lavish parties and empty homes and Kara-

Kara belongs in the loving embrace of a warm home, her world is made of laughter and her sister's inside jokes, a world where Kara would shine bright and be her greatest self. She can't give Kara that, not if she steps into Lena's world. Lena doesn't know why she did it but she finds herself whispering, "And that's my cue." she tilts her head in the general drection of the ballroom where the cheers still hasn't stopped. She steps away from Kara and well, there's really no better word for it, but Lena flees.

She flees and leaves Kara there all alone in the cold air of the night.


"Whoa, sis you okay?" Lex's hands steady her before she falls flat on her face onstage. She gives Lex a nod even though her brother doesn't look all that convinced. Her mother was on the last words of her speech, and Lena prepares herself for the smiling and handshakes and the camera flashes when she catches a glimpse of blonde hair and a blue dress run towards the exit.

Lena's heart sinks.


Present time...

"Where the fuck were you?!" Those were the first words that were hissed into the quiet of their dimly-lit sitting room.

"Hello to you too, dear sister." Lex utters coolly.

"I cannot believe you fucking left me to fend for myself! Did you know how hard Lillian grilled me tonight?" Lena snarled at Lex; low enough not to alert their probably slumbering parents but intimidating enough to make Lex actually feel sorry and scared for himself.

"Now, now, Lena she's still our mom and I'm still your bro-"

"Did you know how terrible it felt to have to ward off her barbs without my brother who promised me-PROMISED ME THAT HE'D BE THERE?" Lena hurtled on, pacing angrily in front of Lex. Lex thinks it's better if he just shuts up for a good 3 minutes and let Lena vent it all out before giving her his alibis.

"And Jillian-" Lex's mind kind of lapsed at that part, who the fuck was Jillian? “--she thought you hated her!" Oh, Jillian. Jillian the date.

Jesus Christ Lena, it even sounds so close to Lillian. It's a terrible, terrible name. That in itself should have already rang warning bells in your head. Lex quietly thought to himself.

"Now, are you gonna fucking tell me where the fuck you were?" Lena finally stopped, breathing heavily, nostrils flaring. "And don't even dare use the excuse that it was a business call, because you left your fucking phone beside your plate." Well, shoot.

Truth it is, then.

"I was at the Danvers'. " Lex admitted lowly, gauging her sister's reaction.

"The Danvers. What the fuck were you doing there? What was so important that you fucking left your little sister?"

"Alex needed help with something." Altered truth it is, then.

"Are you kidding me?" Lena said incredulously, she looked like she was going to snap once again but instead Lena steeled herself, closed her eyes, rubbed her temples and let out a breath. "You know what? Whatever, I don't care anymore. Whatever it is Alex needed I hope you helped, but I just want you to know how much of an asshole you were to me tonight." and with that last statement, Lena swiftly turned her back and promptly walked out on her brother.

Lex let out a sigh and let himself fall on one of the armchairs littered inside their vast sitting room.

His phone pinged.

Alex [10:15 pm]: This plan better work, Luthor.

Alex [10:17 pm]: P.S I hope Lena chewed your ass out for abandoning her.

Oh, the wonders of having a Danvers as a best friend.

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