"Don't worry. The signs will be obvious," Alex promised as she finished lacing Supergirl's costume with Pink Kryptonite.

"How will I know?" Lena asked back, but Alex only gave her a teasing and playful wink before sauntering off, leaving the Luthor to wait and wonder. Luckily, though, Lena didn't have to wait for long. Instead, within the next few hours, a crisis ended up occurring towards the outskirts of National City and, just like always, Supergirl was the first to arrive on the scene. Today, however, Lena was the second. It was a bank robbery, but because it was being orchestrated by normal humans, it didn't take Supergirl very long to put an end to the issue.

Once the criminals had all been relocated to cop cars, the Kryptonian was able to take a moment to survey the crowd and make sure no one had been hurt. Not a single bullet had been fired from the thieves, but that didn't mean people wouldn't have somehow gotten injured. As the Kryptonian made a quick visual sweep of the area, however, she caught sight of a painfully familiar face and suddenly, her heart began to pound. Before she even knew what she was doing, the Girl of Steel had flown over to that familiar face.

"Lena!" she cried, and sure enough, it was.

"Supergirl!" Lena smiled back up at her.

"Are you ok?" Supergirl's concern was instant and obvious.

"Oh, yes, I'm fine," Lena promised as Supergirl landed in front of her. "I was only just passing by when this started." Supergirl looked relived, shoulders lowering back into a relaxed position the moment Lena was able to give her word that she was ok.

"Good," the Kryptonian said. Lena hear the genuinely relieved tone in Supergirl's voice and decided to turn it into her first chance at seeing just what the Pink Kryptonite could do...

"It's sweet that you were worried about me," Lena began. All at once, Supergirl began to shuffle her feet and look away. Interesting. "But it really wasn't necessary," Lena continued.

"Not necessary?" Supergirl didn't look up, but Lena heard a disbelief tinged with protectiveness in her voice. Interesting.

"I would've been fine," Lena tried to sound dismissive of her own wellbeing. "The others are far worthier of your time and your concern."

"What?!" Supergirl nearly interrupted the Luthor, finally looking up to meet her eyes head-on. Lena was surprised to see such an intense protectiveness in her crystal blue eyes. In fact, that protectiveness was bordering on... anger?

"Don't be ridiculous!" the Kryptonian continued passionately. "You are just as important as anyone else!" Lena raised an eyebrow, genuinely surprised by just how fiercely Supergirl was reacting to this idea that Lena's safety shouldn't be one of her concerns. But Supergirl caught herself at the same time Lena did and, while asking why on Earth she was acting like this, she sealed her lips again, but Lena wasn't done with her yet...

"It is sweet that you care," the Luthor repeated, pretending to look flattered and touched.

"Of course I care about you, Lena!" Supergirl sounded hurt that Lena had thought otherwise, but Lena wasn't just focused on that tonal change in Supergirl's voice, she was also fixated on the fact that Supergirl had just called her 'Lena' instead of 'Ms. Luthor'...

"I am sorry to have ever misjudged you," Lena replied. "Can you ever forgive me for doubting you?" she put on the most sincere and sweet expression she could and, just as planned, it worked like a charm.

"Of course I couldn't stay mad at you," the Girl of Steel began, but once Lena raised another eyebrow at this passionate remark, she amended her statement. "I mean, of course I couldn't stay mad at you about something this trivial!" she cleared her throat awkwardly, but Lena continued to give her an almost knowing look that she could no longer meet. It was funny, seeing the Girl of Steel, National City's greatest champion and defender, looking so shy and uncertain. She looked like she was trying far too hard to keep her voice level. Lena loved it.

But the real fun began when Alex, in a "complete and utter coincidence", arrived on the scene as well.

"Supergirl! There you are! Where have you been? The DEO's been looking for you!" she pretended to chide Supergirl.

"Oh, I was just speaking with Ms. Luthor," Supergirl replied, formality returning with the embarrassment she felt that she had been caught hanging around a crime scene just because Lena was there. While Lena smirked, Alex kept up the façade of being disapproving.

"It is all well and good that you wish to spend time with your friends, but you remember you're always supposed to report back to us ASAP, right?" Alex asked, putting a special emphasis on the word "friends". As expected, it caused Supergirl to visibly cringe, looking both disgusted and unhappy with all the implications that the word carried when it stood between her and Lena. Neither Lena nor Alex missed Supergirl's expression.

It was then that the real fun began, Lena suddenly getting a brilliant (or crazy, depending on how you looked at it) idea.

"Don't blame Supergirl for this," she said, pretending to protect the Girl of Steel from Alex. "It was my fault that we got carried away. I just wanted to say hello and, unfortunately, I let it go further than that. I am sorry, it won't happen again."

"Don't be silly!" Supergirl interrupted quickly. "I like talking with you!" and both Lena and Alex had to hide smiles, but before Alex could come up with a reply, Lena continued to speak.

"You, Alex, of all people, should know what a conversationalist I can be," she added.

"Wait, what?" Supergirl demanded, put off by that remark, but Alex caught on fast to Lena's little game and played right along, ignoring Supergirl.

"Of course, how many times have we gone out for coffee and you haven't shut up?" Alex laughed, but she was forced to put on a casual expression to mask how hilarious Supergirl's expression was now. Maybe she wasn't aware of it, but a surge of envy had just shot across her face.

"What?" she repeated. In that moment, Alex decided that they ought to change the phrase "green with envy" to "pink with envy".

"Oh, didn't you know?" Lena played dumb, turning around to meet Supergirl's very jealous gaze head-on. "Alex and I are... friends... We've been hanging out quite a lot recently. Her younger sister, Kara, is the one who kind of got us together..." Lena made sure to give Alex a meaningful glance after that, which Alex returned expertly. Supergirl, however, didn't look quite so happy.

"Ah. Kara Danvers. Of course she did," the Girl of Steel muttered.

"You don't seem happy," Lena observed.

"Oh, no! I was just wondering... you know... how you and Alex knew each other," Supergirl was suddenly unable to meet Lena's eyes again.

"Well, now you know," Lena ignored Supergirl's pathetic attempt at a lie. "It was all thanks to Kara! She's the one who got Alex and I together!" Lena made sure to throw another meaningful smile at Alex, which Alex once again returned.

But even though they were looking at each other, neither Alex nor Lena missed the disappointment on Supergirl's face, which briefly turned into outright rage and envy when Alex and Lena exchanged that sweet little smile. They saw the way Supergirl's forehead had wrinkled a little, and the way her nostrils had flared, and the way she'd suddenly started clenching her hands into fists. The signs really were obvious...

But before Supergirl could do anything regrettable, Alex addressed her once again.

"Let's go back now, you can speak again with Lena later," she said and although Supergirl suddenly looked very reluctant to follow Alex anywhere at the moment, the idea of at least getting Alex away from Lena again was incentive enough for the Girl of Steel to trail obediently after Alex.

"Good day, Ms. Luthor," Supergirl said frostily.

"The same to you," Lena replied, giving Supergirl a charming smile. With that one little quirk of the lips, Supergirl's icy glare had melted again into its more characteristic and awkward expression. Iconic. Poor Supergirl. She couldn't even stay mad at Lena. Lena halfway considered saying a goodbye to Alex as well, just to mess with Supergirl one last time, but Lena decided to be merciful, and instead, she let it be. She only continued to smile fondly at Supergirl as she followed Alex out of the bank and back to the DEO. Supergirl seemed flustered and confused by what Lena's unblinking stare at her meant, but since she was unable to question it, she only gave Lena an awkward half-smile in return before vanishing from Lena's sightline entirely. As soon as she was gone, Lena began to laugh.

A few hours later, Alex and Lena was reunited, laughing together over their shared victory.

"Well, did that prove it to you, or did that prove it to you?" Alex demanded uproariously.

"I can't believe I missed it before!" Lena laughed back. Although Supergirl hadn't done anything too extreme, all the little signs were there. The soft and fond expressions, the protectiveness, the jealousy... Everything! Just like Alex promised.

"I told you! I told you!" Alex insisted, still laughing with Lena at Supergirl's expense.

"Ah, but how did you know?" the Luthor asked once her laughter finally subsided. "What does the Pink Kryptonite actually do?"

"Well, it's going to sound crazy," Alex warned, looking like she was about to burst out laughing again.

"But...?" Lena coaxed excitedly.

"But it turns Kryptonians gay," Alex admitted.

"What?!" Lena burst out laughing again.

"I'm serious!" Alex defended, but she was laughing too. "Crazy as it sounds, studies have shown that Pink Kryptonite turns straight Kryptonians gay, and gay ones even gayer!"

"Well, that explains a lot!" Lena snorted.

"Doesn't it?" Alex replied, and while she and Lena continued to laugh at Supergirl's expense, Lena was already wondering when she would be able to make more Pink Kryptonite... This "pink with envy" Supergirl was easily her new favorite thing in National City, and she looked forward to seeing more of it in the very near future, especially if Alex's remarks about Supergirl being into her were true. And Lena didn't doubt that idea at all anymore. Not after the hilarious Pink Kryptonite incident today.

AN: IDK what Pink Kryptonite would do to an already-gay Kryptonian, but let's just say it only makes their gayness even "worse" (more obvious). Mostly, I just want some awkward, embarrassed, shy SG with a dash of jealous SG, because why not?!