Disclaimer: I do not own Supergirl or anything to do with DC.
*****
"Supergirl, what a wonderful surprise." Lena beamed, "What brings you here?"
"I, erm..." Kara stammered, her mind going blank, forcing her to lamely finish, "I just wanted to see you?"
There was a brief pause and then Lena smiled, "Well, isn't that sweet... would you like a drink?"
"That doesn't affect me, you know that." Kara scoffed, before Lena gave her a look, and she blushed, "Oh, right. Erm, a drink would be lovely, thanks."
Lena smiled, poured them both a drink, and handed one to Kara and then after they both had taken a sip she asked, "So, what does Supergirl do when she's not saving the world?"
"Oh, you know. What everyone else does. Hangout with friends, work, and... other things." Kara played along.
"What things? Things with a boyfriend, maybe? Or a girlfriend?" Lena pushed.
"Why do you want to know?" Kara smiled.
"Because my girlfriend, Kara Danvers, doesn't think you're gay. And I want to prove her wrong." Lena smiled smugly.
They both knew she had already done that, and the smile that was exchanged between them said that, then Kara admitted, "I didn't used to think so, but... I met the most amazing woman, who showed me what I was missing."
"She sounds great." Lena smirked.
"The best." Kara happily concerned, before cautiously adding, "And you're happy too?"
"More than I could ever put into words." Lena confessed softly, before getting them back on track, "She's just so good, and understanding. Like, she noticed that my crush on you was getting out of hand, and she had the most wonderful suggestion for how to deal with it."
Kara couldn't help but blush again, even as she smiled, "Which was?"
Lena smiled, took another sip of her drink, and slowly moved into the other woman's personal space, "You, are my freebie. You know what that means?"
Blushing again Kara replied, "Someone you can sleep with outside of a relationship?"
"Correct." Lena grinned, both girls taking a sip this time, "Interested?"
"Absolutely." Kara beamed, before quickly adding, "You're my freebie too."
Lena had meant to stretch this out, make this a real seduction, but seeing Kara standing there in her cute little Supergirl outfit had got the better of her, and she found herself quickly propositioning the Girl of Steal. Which a few months ago would have freaked Kara out and destroy their friendship, but now Lena was able to quickly finish her drink, take Kara's and put it and hers on the side of her desk, and then gently take Supergirl into her arms and kiss her.
Something Lena had wanted almost as much as kissing her best friend, and lucky her, she now got to do both. Oh yes, she got to press her lips against that pretty little mouth and have Supergirl welcome that kiss, the two women becoming lost in it for a few long minutes.
Then Lena gently manoeuvred them closer to her desk, turned them around, and then lowered them down onto it so their bodies could be pressed against each other while the kiss became increasingly needy and frantic. As did their hand sliding over each other, which initially had been sweet and gentle, but now involved desperate groping.
At least that was the case with Lena's hands. Kara was still afraid of hurting her, which was sweet, and of course given their preferred roles the mighty Supergirl was only too happy to let Lena take control. And again, Lena managed to draw this out too, but she just couldn't resist sliding a hand underneath the material of that infamous costume. Firstly up to feel her boobs, but then maybe a little prematurely she slid a hand under Kara's skirt, although that had very pleasant results.
Breaking the kiss Lena grinned wickedly, "Oooooooh, already so wet for me."
"Always." Kara moaned dreamily, then tried to cover for it, "I mean, you're always so hot, and... and... I've wanted this since the first time I saved you."
Nice save Kara, Lena thought, but instead of saying that she replied, "I've wanted you since the first time I saw you."
Which in Kara's case was the same thing, whereas Lena had seen her on TV before they met, although that was nothing compared to the desire growing between them once they had became friends, and now lovers, Lena smiling as she daydreamed about how far they had come, while gently rubbing Kara through her panties.
Then before Kara could complain about the teasing she rejoined their lips in another kiss, the mighty Supergirl resisting only briefly before melting into it once again, and surrender completely to a Luthor. God, at moments like this Lena almost wished her family could see her. Almost. It would be weird in real life, but she just couldn't help imagining it now, especially as she pushed Kara's panties aside so she could be touching bare flesh, which made Kara gasp into kiss.
Moans and whimpers soon followed as Lena delighted in teasing her super strong lover by continuing to just gently rub her for a few long minutes, before finally pushing a finger into her. Which led to both women loudly gasping, whimpering and especially moaning into each other's mouths, Lena drawing out this moment of pleasure by going as slowly as possible until her finger was buried as far as it could go into Kara's cunt.
She then started pumping that finger in and out of Supergirl's hot little pussy, and breaking the kiss so that Lena could really enjoy the wonderful sounds Kara was making for her. And of course, enjoy the sight of her girlfriend in her superhero costume writhing in pleasure underneath her, and on top of her work desk no less.
Kara was both excited by the public setting, and terrified by it. Lena had assured her that her office was soundproof, at least to human ears, and they were doing this after hours just in case. Still, there were some people still left in the building, and thanks to her super senses Kara was aware of all of them, especially when she found herself being fingered already.
They were moving so fast, but it was hard to complain when Lena was making her feel so good. Besides, the combination of knowing what Lena could do, and the fact that Kara had always found Lena incredibly beautiful even before she had discovered this side of herself, meant that Supergirl was always embarrassingly wet around her girlfriend nowadays.
Of course one of the main reasons she was terrified by doing this was it was very easy for Kara to get distracted and not notice someone heading their way, or worse hurting Lena. Particularly when Lena first pushed a finger into her pussy, and then again when she added the second while starting gently rub Kara's clit.
Because Lena did this at the same time Kara was forced to tilt her head backwards and close her eyes as she let out a loud cry, which was probably a good thing, because she was dangerously close to letting out beams from her eyes because it just felt so good. And Lena wasn't even trying yet. No, this was still technically the teasing phase, and Kara knew what she had to do to get more.
Which was why Kara eventually asked, "Lena! I-"
"That's a little informal, don't you think?" Lena scolded, before grinning, "Call me Ms Luthor."
At first Kara just blushed, but then she pointed out, "Informal? You're inside me!"
"True..." Lena conceded briefly, before pointing out, "But that doesn't guarantee intimacy. And if you want something from me, you must call me Ms Luthor. And asked nicely. Do I make myself clear?"
"Yes Ms Luthor." Kara whimpered, before quickly adding, "Please give me more Ms Luthor. Oooooooh yesssssssss, fuck me harder! Fuck me hard and make me cum!"
"You want to cum? Already?" Lena half laughed, half scolded, "Mmmmmm, who knew that S on your chest stood for Slut? Or maybe Super Slut? Yes, I like that. What are you?"