Disclaimer: I do not own Supergirl or anything to do with DC. I do not make any money from the writing of this story.
*****
"So... I'm kind of dating Sam." Alex said, going for casual, but sounding unsure, so she clarified, "I mean, I am."
There was a brief pause and then Kara randomly said, "Water, wet."
"What?" Alex frowned.
"Sorry, I thought we were just stating the obvious." Kara teased with a beaming smile.
Alex stared daggers at her sister for a few long seconds, and then smirked, "You mean like the fact that your dating Lena?"
"What? Me, dating Lena Luthor? No, no, no, no, NO! We're just friends! Like... best friends. What would make you think that..." Kara protested, before weekly trailing off when she saw the look she was getting from her sister, and then she just sighed and blushed, "Okay, FINE! We're totally dating."
"Ah-ha, I knew it." Alex grinned smugly.
"No, you didn't." Kara whined, "You thought that we were dating like, months ago."
"Or pretty much since you met her." Alex added dryly.
"Yeah, that." Kara grumbled, before insisting, "But we weren't. We only just got together, like, a week ago. So all the stuff you teased me about, was just innocent best friends stuff."
"Uh-huh." Alex replied dryly.
"It was!" Kara insisted, blushing as she remembered a particular accusation, "And for the record, we never had sex in any of those places you said we did."
"Uh-huh." Alex replied dryly.
"We didn't!" Kara protested in disbelief, and way too loud for the little restaurant they were having lunch in.
"Uh-huh." Alex replied dryly.
"Seriously! We just had sex last night!" Kara blurted out without meaning to, and then covered her mouth, and blushed with embarrassment.
"Uh, what?" Alex's eyes went wide in realization of what had just been said, then quickly followed up with, "Kara, that's great. Wow. I'm so proud of you."
"You are?" Kara frowned, a little taken aback by this response.
"Of course." Alex insisted, "I've been there, so believe me, I know, that's a big step. And I'm glad we can talk about this. It's what being sisters is all about."
"Yeah?" Kara smiled softly.
"Yeah." Alex confirmed, "Tell me everything."
Which again caused Kara to blush, although after a brief pause, she realized Alex was just as mortified by the idea as she was, so she grinned teasingly, "Really?"
"Not, not the gory details. Obviously." Alex clarified, "Just overall feelings. You know?"
"I know." Kara beamed, initially struggling to find the words before beginning to babble so fast Alex could barely keep up, "Oh God Alex, it was magical! Like, I was so, so nervous, and I almost asked you for help, but... I just couldn't, you know? So, we just did it, and oh my Rao, Alex, it was amazing! Lena was so sweet, and kind, and patient, guiding me through it every step of the way. I felt so... safe. And loved. And cared for. Rao, I could just kiss her all night long, you know? Oh God, it's so... it's so new, and exciting. And not just the sex. I'm dating her! I'm dating my best friend. Oh Rao, I'm dating a girl! And it's just so... like... wow, you know?"
"Believe me, I know." Alex beamed.
"Was that what it was like with you and Sam? Or you and..." Kara asked brightly, before trailing off as she realized who she had almost mentioned.
"Yeah." Alex said softly, before clarifying, "Well, me and Maggie were never best friends, but she was the one to guide me through the first time, and she was definitely sweet, kind and patient. It made it so easy to fall in love with her. It wasn't the only reason, but it helped. And now..."
"Now you have Sam." Kara said softly, before realization hit, "Oooooooooh, only it's different, because now, you're like... the guide?"
"Exactly." Alex smiled, before confessing, against her better judgment, "And you know what? I like it. I like it a lot. I was so scared that I wouldn't be. Scared that I would screw it up. But... wow."
"That's great." Kara beamed, "In that case, I guess I'm proud of you too."
"You guess?" Alex teased.
"I am!" Kara corrected herself quickly, before groaning when she saw the look on her sister's face, "No fair, you're being mean to me when I'm trying to be supportive."
"I know, I'm sorry. I love you." Alex reached across the table and placed her hand over Kara's.
"I love you too." Kara beamed happily, the two sisters shared a smile for a few brief seconds, before she pointed out, "Look at us. Two queer girls living our best lives. I'm so proud of us."