In Kara's defense, she was really horny, even before Lena joined in.
She was just in the middle of getting herself off when the call for Supergirl came in. They have a sudden half-hour window to break into the bad guy's lair and gain intel — yada yada yada, Kara doesn't really care about the details. She just wants to be in and out, so she can get back to what she was doing before she was so rudely interrupted.
(Look, she was stuck in the Phantom Zone for a long time. There isn't really any time for masturbation between hiding from the Phantoms and trying to figure out a way to escape. She has needs, and it's been a while since she's taken care of them.)
It starts with a simple joke.
It's one of Lena's first missions with the Superfriends. With her position at LuthorCorp dissolved, she's been brought onto the team full-time. Her primary role is experimenting on new weapons and technology to help them on their missions.
And, well, running tech support.
She is the natural choice, with Alex being Sentinel and Kelly becoming Guardian. While Lena is perfectly capable of taking care of herself, she still does best in the Tower, bossing the team around and letting her intellect run the mission.
And, well, she just couldn't help but make a joke about putting the comms on. Kara knows this, logically.
"This is Lena, here to assist you in all your needs," a very sultry voice speaks out. It takes Kara by surprise for a moment. She knows it's meant to be innocent. Lena can't possibly know the predicament she's in, how her sugary voice makes the pulsing of her center only get more intense.
"Hello?" Lena's comes back. "Are you there, Supergirl?"
"Er, yes," Kara replies, stuttering a little in her stupor. "I'm here."
"So, what were you doing when you got the mission call?" Lena asks.
Kara blinks as she tries not to think about the vibrator at her bedside. She feels guilty, for some reason. It's ridiculous, because she's a young woman with healthy sexual needs, and it's not like she planned on Lena doing a sexy voice over the comms literally right after.
"Nothing much," Kara says, trying to keep her voice as light and casual as she can. "Just laying in bed."
Kara's blood runs a few degrees cooler as she dreads the next question; the inevitable inquiry on why she was in bed at 3pm in the afternoon.
("Yeah, I was in the middle of getting myself off with a brand new vibrator," she would have to answer. "I was so eager to try it out after the whole Phantom Zone debacle because my fingers just weren't doing the trick at the moment and then Brainy called me, leaving me miserable and horny.")
The question never comes.
"Sounds relaxing," Lena says calmly. "I was enjoying a nice afternoon myself."
Kara's knees grow a little weaker with every word she says. She doesn't think she's ever gotten off just from a voice, but she feels like she could combust at any moment. Every bit of this feels so wrong, but truly, Kara was probably only a few seconds from coming when the bad guy decided to ruin her life and leave his lair unattended.
Goddamn Supergirl responsibilities. It's the bane of her existence at this moment.
"I've managed to pull up your cameras," Lena announces. "Now, let's see if we can bring that computer back to life."
Kara stops, realizing there's a computer in front of her. She barely even recalls getting here, but her mission-mind is on autodrive. Thankfully. Or else nothing would get done, probably.
"Do you need to me to — "
" — Looks like it's off," Lena interrupts. "We're going to need to boot it up."
It's a very innocent and seemingly unsexy sentence, but something within Kara quivers anyway. She bites her bottom lip as she tries to hold in a gasp or a moan or whatever else her treacherous mouth is begging to let out.
Kara tries very, very hard not to think about earlier, when she was sprawled out on the bed, her hand pressed against —
"Why don't you go ahead and press the button lightly?" Lena suggests.
Kara's brain stops.
"What?" she squeaks out.
"Just lightly tap on the button," Lena repeats. "A few taps should be enough to get it to turn on."
Oh, Kara suddenly doesn't think that getting turned on is much of an issue anymore. That's covered, no doubt about it.
"Yes," Lena replies. "The power button."
Oh, wait. The computer.
Lena's talking about the computer.
Kara clears her throat a little, trying to break herself back into reality. She taps on the computer lightly, stroking it like she was stroking her own just earlier —
Right, right, back to reality.
She presses the power button lightly, just enough for it to click.
"It didn't turn on," Kara says, trying to keep her voice steady. It still comes out a little too high-pitched for her taste.
Lena tsks. It sends delicious goosebumps up Kara's spine. "Well," she drawls. "That's a shame. Now, try to press a little harder. Maybe tap a few times."
Kara lets out a small, short hum as she imagines things she really shouldn't be imagining while on the comms during a mission. Nonetheless, she tries the things that Lena suggests. She presses a little. Taps. Runs her fingers along and around.
The computer still doesn't turn on.
"Harder," Lena says eagerly. "Just a little harder." Kara's breath gets a little ragged, but she presses the button...
The computer lights up!
"Wonderful work, Supergirl," Lena drawls, and the words go straight to Kara's clit. She's imagined Lena saying something along those lines, in that tone, for years. She can't help but be affected, and the reality of it sounds even better to her ears.
"Rao," Kara exhales.
Kara bites her lip again. It's going to go raw at this rate of abuse. "Er, nothing. Just... What's next?"
"I need you to give it to me," Lena says next and — oh my Rao, does this girl know what she's even saying? She couldn't sound dirtier even if she tried. "Just stick the device in the hole."
Kara holds out the USB shakily, struggling to put it in. It takes a few tries.
"Having trouble there, Supergirl?" Lena asks, almost sounding smug. Kara just wishes she could be there in person so she can wipe that smirk off her face (because she just knows Lena is definitely smirking at her current inability to plug in a USB).
Kara finally manages to get the USB in. It's normal. No one gets a USB in on the first try — except Lena, because she's perfect. It's like they're designed to infuriate people. It's normal. It's not because Kara is shaking and her underwear is soaked. It's completely normal to have trouble with the USB.
"I'm doing just fine, thank you very much," Kara replies with determination.
"You're very welcome."
The blood in Kara's veins sings at Lena's self-assured cockiness. She finds it super hot on a normal day, and that feeling is magnified by ten-thousand suns when she's already hot and bothered. This is not good. Whoever decided that Lena should be running tech support is now her biggest enemy and she will never forgive them.
"Now, where were we?" Lena all but purrs. "Oh, right. The faster you come, the better."
Kara yelps. How could she not? Lena just said —
"There's some really important information in there," she continues. "The faster you get it onto the USB and come back, the fast we can get the info to take this guy down."
Right. Right. Of course, that's what she meant.
"Faster," Lena almost whispers. The noise tickles Kara's ears and her eyes roll back a little at how it makes her skin dance. "Faster."
"I'm not sure I can go any faster," Kara chokes out. It's so hard to not imagine that their situation is different and Lena is saying these things in an entirely different context. In a bedroom, for example. Or on a couch. Or the kitchen counter. She's not picky.
"Not even for me?"
Kara can picture her pouting face. "I don't know," she manages to get out. "You're the tech genius. If you have any tips..."
"I have plenty of tips," Lena teases, — Oh my Rao, that was definitely teasing, there's no hiding it, Kara's going to die — "but none of them are relevant to this particular situation."
It slips out of her mouth before she can control it.
"What was that, Supergirl?"
"Nothing," Kara answers a little too quickly. This is so bad; she's in the middle of a super important mission, on comms with her best friend, who is just having an innocent conversation, unaware of how close to the edge Kara actually is. With nothing to do as this stupid USB is stuck collecting data, it's excruciatingly at the forefront of her mind.
"If you say so," Lena quips back. "Now, are you sure you can't go any faster?"
"No," Kara grinds out.
"Oh, if only I could come," Lena says, her voice like honey. "If I came, you'd be so much more satisfied with my performance."
Goodness, this has to be on purpose. The voice is just too much. Kara's eyes harshly shut as she tries to focus on something else. Dead puppies. That time she got fired. William. Literally every unsexy thing in the world that can hopefully get the pulsing between her legs to cease so she can carry on this mission in peace.
"Lena, I can promise that your performance is just fine," Kara says slowly. She understands how it only adds fuel to the fire, but that's a fire that's only on her side. She's safe.
"I'm only here to please you," Lena responds eagerly. "As long as you'll let me."
("Oh, I'd let you all night long," Kara desperately wants to respond.)
"Oh! Oh!" Lena cries out in a way that reminds Kara too much of a delicious cry of pleasure. "That's it!"
Kara literally brings up her hand so she can bite down on her knuckle. She can't wait to get home, knowing how Lena Luthor sounds when she says that.
"Supergirl!" she moans out again! "You're so close!"
Yes, I really am, she thinks as she groans against her knuckle. If only she could carefully sneak a hand down to press against her clit, she'd be flying high soon enough. But, while on recorded cams, that's too risky, this is all too risky, and she moves to grip the table as her legs are about to give out and —
The way her suit rubs against her is wonderful. She's never really noticed it before, but the way the skin-tight material is rough and pressed against her crotch is exactly what she needs. She's never been more grateful to the switch to pants; a skirt would've never provided this kind of relief. She wiggles her legs a little, letting the friction do the work as she grips on the table with one hand, biting down on her knuckles to keep her from crying out with the other.
She's so close. She's never been so affected by just a voice — a voice that's unintentionally dirty talking at that — but it's been enough to drag her to the edge. She can feel the heat in her belly build and build. She's so close to bursting, to feeling the euphoria of that old-familiar white-hot burning feeling that hasn't consumed her body since she first got sent to the Phantom Zone.
"You're so close!" Lena encourages, as Kara gasps out, her hand flying out of her mouth because she can't breathe and she uses both hands to grip the table like her life depends on it. The wood shifts under her strength and in the back of her mind, she's terrified it might give out, but she can't be bothered to think about that too much right now.
"Release!" Lena cries out suddenly. "You're there! Just release and come!"
"Yes!" Kara screams out, creating two distinct hand-shaped patterns into the table.
Kara's so close. She lets out a breathy moan, unable to hold it in anymore. Just a little further, just one more word from Lena —
"Will you two stop already?" Alex's voice pitches in and it's like a dose of cold water over her. "Everyone can hear you."
The heat that was just beginning to blossom from her core throughout her body suddenly shrinks and retreats back to her lower belly as her eyes fly open, reality setting in with a sinking feeling. Kara suddenly feels a very different kind of heat, one that lights her face bright red with embarrassment. Her eyes are face-to-face with the blinking screen, showing that the data transfer is finished.
Lena had been talking about the data transfer, she has to remind herself. She was only seconds away from having the orgasm of her life during an innocent conversation where the other party was absolutely clueless of what she was doing, while her sister, her boss, and her closest friends were all listening.
If the universe suddenly decided to open a portal that sucked her back into the dark and cold void of the Phantom Zone, she'd welcome it with open arms at this moment.
"Stop what?" Lena asks all-too-innocently.
"You know exactly what I'm talking about," Alex snaps. "Whatever your intentions, I'll remind you we're on an important mission."
Kara can only imagine Lena's doe eyes as she says, "I assure you, I have no intentions."
It's in that moment that Kara knows, with startling clarity, that she knows exactly what she's been doing. Everything Lena's said in the past ten minutes has been careful and deliberate.
"They're awfully enthusiastic about this data," Brainy pitches in.
"That's not what they were enthusiastic about," Alex mutters.
"I told you we should've turned the comms off and let them figure it out," J'onn's voice echoes in the background.
Kara almost feels mortified.
Her horniness still is all-consuming.
(In her defense, she was literally seconds away from an orgasm. She's allowed to be mildly upset.)
When they're all back in the Tower after the mission, the blood in Kara's veins is a little cooler. The heat has dissipated, for the most part, but the want is still simmering beneath the surface. She's a bit more level headed, which makes her have half the mind to turn a little red every time she looks at her sister.
Who heard the entire thing.
Everyone in this room heard Lena teasing Kara not-so-subtly. And Kara completely getting lost in it.
Luckily, no one mentions the ordeal. Lena doesn't even make another innuendo, though she does send her a little wink that makes her knees go weak when the meeting disbands.
Kara spends what feels like an eternity going over what she's going to say to Lena. She debates denying that she was affected, and was, in fact, very enthusiastic about the data they were collecting. So enthusiastic that she almost turned a desk to dust in her excitement.
Even in her head, that lie sounds unbelievably fake. Yet, she can't quite bring herself to say the entire truth.
("Lena, your voice is the hottest thing in the universe," she'd say if she was brave. "So, yes, hearing you egging me on over the comms like that was enough to get me off."
Then, ideally, this confession would be followed with Lena replying, "Well, let's head back to your place so you can find out how hot I am in the flesh."
So what if dream-Lena is quoting a bad lesbian porno? Kara can see real Lena saying it, so it's justified!)
She settles for the middle ground.
"That was not cool," Kara mumbles when she and Lena are left alone in the Tower as the team busies themselves with their own work. "You messed with me when I was vulnerable."
Lena's smile is devilish. "I'm sure you were." Kara sends her a deathly glare. "Consider this an apology."
She holds up three small little earbuds, not unlike the ones they use for comms. Her smirk says she really isn't sorry, and Kara isn't sure if this is more teasing or some kind of joke. "What is it?"
"What does it look like they are?" Lena asks, raising her eyebrows a little, the smirk still gracing her lips. "They're comms. They go in your ears."
Lena's hands come up to her face and delicately, with precision, Lena places a comm in one ear, and then the other. Kara is frozen as her fingers trail along her skin — the sides of her face, the lobes and the sensitive tips of her ears, then an index finger dragging softly across her cheek.
"Like that," Lena whispers, next to her ear. They're close. So close. If Kara leans in just a little...
But it's short-lived, because Lena steps away, ripping all contact between their bodies. Kara mourns it.
Lena's still holding the third earbud.
"What's that?" Kara asks breathily, heartbeat racing out of control.
Lena tenderly places it within Kara's hand. "Consider it a surprise," she answers vaguely. "You'll know what it's for when the time comes."
Something about the way she says it that makes Kara nod shakily, clutching the mystery earbud-looking item in her hand.
"Now, turn these on in an hour," Lena demands as she taps on Kara's ear lightly.
Kara blinks. "An hour? But the mission is over, I'll be at home — "
"Exactly," Lena replies. "Fun little fact about these comms: We're the only two on them. Purely recreational."
Kara's mouth drops open as the breath leaves her lungs. Kara's going to combust. She's sure of it. Any moment now, she's going to wake up wet and wanting because there's no way that this is real —
"Now, be a good girl, Supergirl," Lena whispers huskily, leaning in a little. "Go get yourself comfortable. I'll be ready on the hour, I expect you to be as well."
Kara's never flown home faster.