It's Alex and Maggie's first wedding anniversary and Kara joins them to celebrate. Little does she know that they have an announcement to make. Kara's super super (pun intended) strong x-ray vision reveals something very exciting.

"See you tonight at our place?" Alex asks Kara down the comms. Supergirl has just dealt with a bank robbery while Alex is back at the DEO headquarters.

"Only if there's pizza," Kara replies, and Alex can hear her sister's smile as she speaks.

"Of course there'll be pizza. See you at 7?"

"I'll be there."

Supergirl flies back towards the DEO to debrief J'onn. Alex, meanwhile, heads back to her apartment where Maggie is waiting for her.

"Hey, sweetie," she shouts into the seemingly empty room as she flicks her shoes off.

Maggie suddenly appears in the kitchen from behind the island where she was putting away pizza menus.

"Hey, Danvers," she replies, walking around the island to her wife and giving her a lingering kiss. "Pizza is on its way."

"You know me and Kara so well," Alex says, impressed.

She takes off her leather jacket and places it on one of the bar stools. As she sits down, Maggie notices that she begins to play with the zip.

"Hey Alex, are you okay?" Maggie asks, concerned by Alex's fidgeting.

"Yeah. I guess I'm just nervous." Alex shrugs as she speaks, looking down at the countertop in front of her.

Maggie perches on the stool next to her wife, her feet just about touching the bars. "You have nothing to be nervous about. Kara is going to be so happy, so excited, and you should be too. And tomorrow's going to be fine."

"I am excited. It's just such a big step, you know? It's something that I've always wanted, it's just now that it's here it's… Scary. And so exciting." Alex beams at that last part and is beginning to relax.

Maggie gently rubs her wife's arm by way of reassurance. "I know, sweetie, but you have no reason to worry. Trust me."

"Always."

And Alex does.

/

Kara arrives at seven on the dot, prompt as usual. Maggie opens the door to her and the two women embrace.

"Hi, Mags," Kara says.

"Hey, Little Danvers. Alex is just in the bathroom and the pizza is due any minute now."

"Great, I'm starving!" Kara exclaims, hanging up her coat and putting on the slippers that she keeps at their apartment.

The two make their way to the couch.

"I can't believe that you guys have been married for a year," says Kara, shaking her head in disbelief. She pulls out a card from her handbag and hands it to Maggie, giving her a beaming smile. "I'm so, so happy for you."

"Oh Kara, you didn't have to," Maggie says, pulling the younger woman into another hug. She pops the card to one side to allow Alex to open it.

The older Danvers finally appears from the bathroom.

"Hey, congratulations!" Kara exclaims, jumping up from the couch and pulling her sister into the tightest hug possible without breaking anything.

Alex pulls out of the hug and thanks her sister, giving her a warm smile. Despite this, Kara can sense that Alex is nervous about something. She can hear the slight elevation in her heartbeat and makes a mental note to ask her about it tomorrow. But tonight, she decides, is for celebrating!

The pizza arrives shortly after, and Kara hands the delivery man the money, insisting to Alex and Maggie that it's her treat. They sit in the kitchen, Kara with a whole pizza to herself and Alex and Maggie sharing.

After they talk about work and what film they're going to watch later, Kara says, "I'm surprised you guys didn't want to spend the evening alone."

Alex and Maggie look at each other, smiles breaking across their faces.

Kara looks from one woman to the other, trying to work out what it is that she doesn't know.

"What? What is it?"

Alex shuffles in her seat before looking back at Maggie again. The detective takes Alex's hand in hers and nods reassuringly.

"We're gonna have a baby!"

Alex's words linger in the air for a brief moment. Kara looks between the two women again and then jumps off her stool, sending it crashing to the ground. Her hand flies to her mouth in shock, almost covering the smile that has erupted across her features, reaching her sparkling blue eyes. She squeals as she runs around the island to Alex and Maggie, engulfing them both in the biggest group hug possible. She squeezes a little too tightly, causing both women to cry a muffled "ouch".

"Sorry, sorry," she apologises as she releases them from her strong embrace. She's completely shocked. "I just can't believe it! I'm so happy for you guys!"

Alex beams at her sister and then at Maggie, and the detective puts her arms around her wife, planting a kiss on her cheek.

"We can't believe it either," Alex says, resting her head against Maggie's shoulder. "We've been married a year now and we've talked it through and through. We're so excited!"

The women hug again. Kara can hear both Alex and Maggie's hearts pumping in their chests, beating at a hundred miles per hour, and Kara's own heart surges even more at the happiness she feels for the two most important women in her life.

"Tell me everything, I wanna know everything," Kara says as they all forget about their pizza and flop onto the couch in the living room.

Alex pauses, unsure of where to start. After composing her thoughts, she begins, "Well, you know that I've always wanted to be a mom."

Kara nods, never letting the smile drop from her face and hanging onto Alex's every word. She knows how much being a mom means to her sister.

"We're going to use a donor. We narrowed them down together but I let Maggie choose."

"Well yeah, but we agreed," Maggie says, getting up and handing a piece of paper to Kara.

Kara scans the sheet. It contains a photo, description and family medical history of a man. "This is him?"

"Yeah," Alex says. "He's perfect." Maggie nods her agreement.

"He certainly seems to be. But you're not pregnant yet, right?" Kara isn't wearing her glasses and her x-ray vision isn't showing anything.

"No. We have an appointment tomorrow at the clinic!" The anticipation in Alex's voice fills Kara with pride.

"You should come, Kara. We'd love for you to be there." Maggie's offer is sincere. She knows how much it would mean to Alex.

Kara doesn't know what to say. She can't believe that her sister is going to have a baby, and that it's all happening so quickly! Finally, she finds some words. "Are you sure?"

"Absolutely," Maggie says, and Alex nods.

"Well then I'd be honoured."

"Just one thing," Alex begins, "Can we keep this just between us for now? Until we know more?"

"My lips are sealed, I won't even tell Mon-El. He's rubbish at keeping secrets."

The three women spend the rest of the evening talking excitedly about babies and the appointment tomorrow. Kara flies home shortly after ten fifteen to let Alex and Maggie spend the rest of their anniversary together and prepare for their big day.

/

Alex bounces her leg in nervous anticipation in the hospital waiting room. Maggie is sat to her right, reading through some of the forms that the doctors have given to her and Alex. She can see her wife's fidgeting out of the corner of her eye and places the sheets on the empty seat next to her. She puts her hand on Alex's arm and plants a long, reassuring kiss on her cheek.

Kara, who is sat to Alex's left, takes her sister's hand in her own and strokes it gently. Alex's breathing slows, and she begins to feel more relaxed.

That is, until the doctor calls her name.

"Mrs Danvers-Sawyer?"

Alex stands, sucks in a deep breath and nods, and the women either side of her stand too.

"Good luck, you guys!" Kara gives them a wide smile, squeezes Alex's hand and sits back down.

"Thanks, Little Danvers," comes Maggie's reply as Alex returns her sister's smile, and the two women disappear into the doctor's office.

/

Three and a half weeks later, it's Alex and Maggie's turn to host movie night. Kara shows up at their apartment bearing popcorn and adjusts her glasses as she waits for someone to answer the door.

Alex lets her sister in.

"Hey, so I was thinking we could watch Bridget Jones's Baby?" Kara suggests, setting the DVD on the counter and putting the popcorn in the microwave.

"Sure," Alex says, picking up the box and inserting the disk into the player. "No Mon-El tonight?"

"No, he's got a shift at the bar."

A minute later, the microwave beeps, Kara retrieves the popcorn and the three women munch away and laugh happily as they watch Bridget stumble through life.

At the end of the film, Alex stands to clear their glasses and the popcorn bowl. Kara takes off her glasses, which she'd forgotten she was wearing, and tiredly rubs her eyes. She looks up at her sister as she walks away, and does a double take.

"Hey Alex, have you done a test today?" Kara tries to ask nonchalantly.

"No, why?" Alex replies, thinking little of her sister's question.

"I think you might want to."

Alex realises the implications of Kara's words. "Oh my God," she gasps, almost dropping the glasses.

Maggie stands and makes her way over to her wife. Taking the other woman's hands in hers, she looks up into those beautiful brown eyes that she knows so well, those eyes that are now brimming with happy tears. 'Come on, Danvers, what are we waiting for?" Maggie says gently, a smile breaking across her face.

Alex sucks in a deep breath and exhales slowly. She's speechless for a moment until she manages, "I'm gonna go take a test!" She almost runs to the bathroom, barely able to contain her excitement. After closing the door behind her, she fumbles around in the cabinet, her hands shaking as she pulls out a test.

"Keep it cool, Alex," she has to tell herself in order to calm down.

She takes the test, emerging from the bathroom to find Maggie and Kara sat together on the couch. They both turn to look at Alex, their expectant gazes finding the small stick in her hand.

"Three more minutes, I guess," Alex declares, sitting between her two favourite women.

"I'll set a timer," Kara says, pulling her phone from her pocket.

The next two minutes pass so slowly that Alex can't deal with the suspense. "Here," she says, passing the test to Kara. "I can't look."

Kara looks down at the little stick in her hand and can't quite believe that this result could change Alex and Maggie's lives forever.

"Thirty more seconds," Kara states, causing Alex to groan with impatience and then start pacing. Maggie watches as Alex walks the length of the coffee table and back and it makes her heart beat faster with every passing second.

The timer rings loudly in everyone's ears. Alex stops pacing and looks expectantly at Kara. Maggie stops nervously bouncing her legs and rises from the couch, standing next to Alex. She finds her wife's hand and their fingers lock tightly as Maggie gives it a squeeze.

"Well?" Alex asks, eyes wide.

Kara looks down at the little window on the test.

The world feels like it stops.

Kara looks back up at the two women whose eyes are completely trained on her, giving her their undivided attention. Her face erupts into a smile as she nods.

"It's positive! You're gonna be moms!"

The three women descend into hysteria, all the tension from moments before dissipating and turning into excitement, disbelief, happiness.

"Oh my God," Alex stammers, "OH MY GOD!" She begins to jump up and down before she feels Maggie's arms loop around her. The two women hug each other tighter than they've ever hugged before, never wanting to let go.

Kara watches the two women she loves more than anything, sees their happiness, their delight, and doesn't feel like she'll ever stop smiling.

Alex and Maggie release each other from their hug and see Kara stood watching them.

"C'mere, Little Danvers," Maggie says, and she and Alex hold out their arms, inviting Kara to join their hug.

"Oh, you guys!" Kara feels a tear slip down her cheek as she envelopes them both. "Congratulations!" She breaks away and looks down at Alex and Maggie, who are both crying too.

"We're gonna be moms!" exclaims Alex. "You're gonna be an aunt!" She turns to Kara, who can't hold in her emotion any longer and properly cries with them.

"I love you," Maggie tells Alex before kissing her intensely. "And you, Pea," she says, holding Alex's waist and looking at her stomach.

Alex laughs and reaches out to stroke Maggie's hair. "We love you too, forever."