This prompt is from Christy811: Beckett and Alexis are both pregnant at the same time (as kinda suggested in 6x10) and Castle is going crazy. Maybe he hides with Jim or the boys.

"DAAAAAAD!" Alexis screamed from her spot on the couch.

"I'm coming."

"RIIIIIIICK."

"How am I so lucky that both of you got pregnant in the same week, and Alexis... have you figured out who the father is?" Castle asked pointedly.

"SHUT. UP." Alexis ground out through her teeth.

"Hey Castle, remember how I told you good girls always end up marrying guys like there father?"

"Yeah."

"Well this is what happens first, this is her wild child phase. She's just a late bloomer, but when she gets married," she chuckled, "you, my friend, are in for a treat." Castle groaned, and picked up Alexis' rocky road ice cream with whipped cream covered pickles and Kate's partial smorelette, filled with cheese, marshmallows, chocolate, graham crackers, and hot dogs. He strode into the living room to find Kate and Alexis having a civilized conversation.

"I don't get it." their heads snapped up towards the direction in which the sound came from, "Why do I get yelled at? You two are sitting her whispering, I'm assuming about me, and I get screamed at."

"It's because we love you." both Alexis and Becket said before filling the silent loft with giggles.

"I thought Alexis would always be on my side." Castle pouted, sticking his bottom lip out.

"You're the one who married Kate, and you can blame the guy who knocked me up that we are so close. We both have a pregnancy glow." Alexis teased.

"You know what? You guys have each other, I think you'll be fine for a night..." he grabbed his coat and made his way to the door, "or two." After his body disappeared from the door, Kate and Alexis turned towards each other and lifted their hands to do a hand shake that they made up at three in the morning over a couple tubs of ice cream. They soon finished their food, and sat closer together on the couch to watch a movie.

Jim was just about to drift off into a blissful sleep when he heard a knocking at the door. Sighing, he got up and made his way to the door. Upon opening it, he came face to face with Rick Castle. "Richard?"

"Please call me Rick, I've told you that before." he pleaded.

"Okay, Rick, what's up?" he yawned.

"Can I hide out here for a while? I mean it's fine if you don't want me to, I can always just bug Ryan or Espo, but I figure no one will suspect that I'd come here."

"Sure," he yawned again, "but i hope you don't mind if I go to sleep."

"No, no, it's not a problem." Castle replied moving into his apartment.

"May I ask why you are here?" Jim questioned.

"My daughter."

"Yours? Meaning Alexis?" Castle nodded, and Jim chuckled.

"What?"

"Nothing... Nothing, it's just that when Johanna was pregnant with Katie, she could be evil. By the way, how is my daughter doing?"

"Oh, fine... fine. Her and Alexis are teamed up against me, so-" he was interrupted by the a harsh belts of laughter escaping Jim mouth. "What now?" Castle asked, slightly confused.

"C'mon, Rick, you're the writer... don't you see the irony in this situatuation? You, coming to me to hide from the two women in your life, one being my daughter. My point is, you came to me to complain about Kate to me, her father."

"Thanks for using irony correctly."

"Now I'm confused."

"Nevermind... I'm going to go and interrupt Jenny and Ryan's evening... they have a toddler, there is no way in hell they have plans." And with that he was out the door.

Twenty minutes later Rick arrived at the Ryan's apartment building, he rode the elevator to their apartment, and as he walked out, her checked his watch. 8:20. He would have enough time before they went to bed. Castle reached the door, and smiled to himself when her heard the music coming from inside. It was the monotonous, irritating baby music that he has come to know too well. He knocked, and the door instantly opened, revealing a disheveled Jenny. "I, ah.. should. Um. Come back later." Castle shook his head at every stutter.

"No! No please no. We can't find Sarah. She's missing."

"Oh, okay, I'll stay, but under one condition..."

"Anything."

"I can stay after we find her."

"Sure, please come in." Jenny stepped out of the way of the door opening, and Castle entered, everything was turned on end. Toys, pillows, and blankets were strewn everywhere. Ryan appeared out from the middle of the mess,

"Castle! Oh, thank God you're hear... we can't find Sarah, we've searched everywhere."

"So I've heard." Castle retorted. They started looking, replacing everything back to its original position, and tearing it down again.

Meanwhile, the two Castle women were playing Wii tennis, it was a simple, slow-pace game. Both of them being eight months pregnant, it was difficult to do more tennis. In bowling, their bellies would get in the way. In golf, their bellies would get in the way. And neither of them liked boxing, so they settled for tennis, even though Castle disproved. They had been playing for about twenty minutes before Kate started experiencing dull pains in her back and thighs, she figured they were Braxton Hicks, but they started coming in regular intervals and spreading to her lower abdomen. Alexis noticed her discomfort, but thought the same thing as Beckett did at first.

They kept playing for another twenty minutes, and that was when reality struck. Alexis had been in the bathroom when Beckett felt a warm liquid start oozing down her leg, her eyes grew wide, and her hand stilled mid-serve.

She stood there in silence, arm still raised above her hand. Alexis came back from the bathroom finding Kate frozen in said position.

"Kate?" she broke the silence, "Are you okay? seeing the rough shake of her head, she rushed over to her and helped her sit down. "What happened?"

"Call your father." It was the only thing she could utter out as another contraction ripped through her abdomen. Alexis still had no clue what was going on, but she followed the orders, and the phone rang twice before he picked up.

"Castle."

"Dad!" her worried tone caught him off guard, but drew him further into the conversation.

"What's wrong sweetie?" his voice was now matching hers.

"Kate... I don't know what's happening, but she told me to call you." As if on cue, Beckett's scream ripped through the loft.

"BABY'S COMING." hearts stopped, eyes widened, and breathing quickened at the announcement.

"I'll be there in ten." the line went dead, leaving Alexis alone in a terrified state. She slowly regained composure and dragged herself over to a moaning Kate. When she took in the scene in front of her, she ran into Castle and Beckett's bedroom and grabbed Kate's bag for the hospital. It took a matter of seconds for her to return to the living room where Kate was still sitting, fighting through the, what felt like, never ending pain. When she noticed the pooling of liquid, she cringed, but quickly straightened out her face when she realized that soon that would be her. Castle said he would be there in ten minutes, so Alexis checked her phone and looked at how long before she had called him. Seven minutes ago, she thought.

Castle, Jenny, and Kevin had torn apart the house numerous times, and the music had long since been stopped, so when Castle got the news, he felt helpless... his child was coming and another child was missing. Kate needed him, so he started to run out the door, but before he did, he couldn't help but hear a soft giggle coming from the front corridor of the apartment.

"What was that?" he breathed.

"What was what?" Ryan said, walking up to him. Another, louder, giggle erupted throughout the hallway. "Oh... Jenny we forgot to check the hall closet."

"You're kidding." Rick walked over the the door and pulled it open, he found Sarah-Grace laying on top on a couple fluffy blankets, playing with her feet.

"He's not." he spun around holding the baby out in front of him. "Here, now you take your kid, I have to go get mine!"

Castle burst through the doors of his loft. Alexis and Kate's heads snapped up and looked at him, the fear in both softening a bit. "Rick, you made it!"

"I wouldn't miss this moment for anything." It was corny, but explained more than was said. "We," he gestured between him and his daughter, "need to get you to the hospital."

"D'ya think?" Kate snapped.

"Yeah, Lex, get her bag... I'll walk her to the car." Alexis, once again, obeyed orders and gathered everyone's items.

Seventeen hours of hard labor later, Kate sat in bed with her baby boy, Alex Graham Castle.

Alexis sat to her right, while Castle admired her from her left.

"Well now I only have to deal with one lovely pregnant woman in my house." a harsh flash of pain flickered through Alexis, causing her to cry out, and then she felt like she peed herself.

I, I... but how, I've barely had any contractions, nope wait I did. I was too distracted by Kate for hours, and they weren't strong enough, but now... They are, she thought.

"Not for long, not for long." she displayed a sheepish smile, and Castle whisked her away to find a nurse. Kate just stared down at her baby, too happy to even know that anyone had left her side.

A/N: Just so you know, I re-read this after I posted it, and am only realizing now that I named the baby after an inventor.