Prompt from anon on tumblr: Meredith arrives to the loft and finds Alexis with a new born baby in her arms thinking is hers.

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Alexis Castle loves babysitting her siblings, has loved since James was born. Even more now that she has her sitter-buddy.

She's just confident that when the time comes, he'll be a great father. She just knows it. He's already so great with her brother and sisters.

After moving in together almost two years ago, they still volunteered to help with James and Hayley. Now that Savannah is finally an actual member of the family, they have babysat once the whole gang. Which means tonight is the second time and...

...so far so good.

James is all grown up and has a great sense of responsibility when it comes to both his little sisters. It means he helps around a lot more now and tries to calm Hayley down when Savannah starts crying and vice versa, instead of "joining the fun" like he did up until Savannah was born.

Tonight, Kate and her dad went on a date for the first time since Kate's eighth month of the pregnancy. Ever since her doctor labeled it as a risky pregnancy, Kate had to back off from work and get some rest or it'd be bad for the baby.

So now that everything went just fine and Savannah is on her second very healthy month, Alexis fixed them up a date they didn't have the heart to refuse. As for her fiancée - oh my, it sounds so right! - he's having a blast! He adores the kids and has so much patience for them, it's insane.

There he is playing around the living room with James and Hayley and they're all having the time of their lives. "Liam, can you play laser tag with us? Please?" James asks while on his knees with his hands clenched together against his chest.

"Pwease, pwease Wiam?" Hayley imitating her brother is the most adorable thing and Alexis knows that Liam won't resist those puppy dog eyes they're giving him.

"Well, at least I have you to keep me some company, don't I baby girl?" She coos at Savannah who grabs her finger with her teeny tiny strong little hand. "Yeah, I know... Dad will teach you in a few years and then we'll get Hayley on our team and we'll finally play a fair game against the boys!" A giggle from the baby. "Great idea, huh?" Another giggle. "I know you'd agree, sweetheart."

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Later, as Alexis prepares Savannah's formula and Liam and the kids put the second box with laser tag things away, there's a knock on the door. Unexpected surprise.

Ever since 3XK and Bracken and all the problems associated with the two psychos, the Castles have been very protective of one another. Even more once the kids were born and Liam knows about this. That's why he looks at his fiancée, his eyebrow lifted in question.

She nods once and with Hayley in his arms, Liam walks up to the door with James close behind. At the same time, Alexis takes Savannah in her arms and goes to the couch to feed her. The baby is just starting to eat when her big sister hears that unmistakable voice. "Liam, sweetheart!" Her mother's.

"How are you Meredith?" Her soon-to-be son-in-law greets her.

"Marvelous! You?"

"Never better." Liam then turns to the boy beside him. "James, you know who Meredith is, don't you?"

"Yeah!" The 6 year old nods. "You're Alexis's mom. I'm Jamie!" He extends his small hand for her to take.

"Yes, I know who you are!" Meredith finds adorable the fact that this carbon copy of her ex-husband also has his charm so she shakes his hand before looking at the girl Liam's been holding against his hip. "And you must be…Hayley?"

"Hi!" The girl giggles and waves her hand.

"Oh my, you're all so grown up!" That's when her own daughter appears in her sight…holding a newborn baby! "Alexis, darling is that…? I mean…is she yours?" Liam and James step aside to let her in and walk up to the other red headed woman in the room. Liam closes the front door and puts Hayley down so they can get closer to the other ladies. "I know I haven't come here for three years but… Do I have a newborn granddaughter without knowing?!" She finishes her panic attack as she gets closer, drops her bag on the couch and the baby takes hold of her index finger, squeezing it.

"Wow, hi mom!" Alexis chuckles. "Relax, no, you're not a grandma yet." She shares a look with Liam, who just winks at her. "Mom, this is Savannah Maeve Castle. She's just over two months old but she's one hell of a fighter. Aren't you?" She coos at the sleepy girl who's fighting against her heavy eyelids just so she can look at this new person in front of her.

"Hey Savannah, you have a beautiful name to go with your beautiful eyes." Meredith is in total awe of the girl. "Why do you say she's a fighter? Is everything okay with Kate?" Even though in her visits these last years, Meredith has stayed at a hotel, her relationship with Kate has only improved. Much better than that first time after Castle and Beckett got together.

"Yeah, everything's good. They just had a little struggle what with Kate's stress about it being a risky pregnancy, then Savannah suffered a bit during labor so they ended up staying in the hospital for the first week of her life." Alexis looks up from her sister back to her mother. "But, you know, Kate is a fighter, so it's in these little guys too."

"Oh, I'm just glad they're okay." Then she looks down at the baby and back to her daughter. "Do you think I can...I mean, can I hold her?" Alexis smiles and nods before carefully putting Savannah in Meredith's arms. She fusses a little but eventually calms down. "She's such a good baby."

"That she is." Liam speaks up with his arms around the other two kids.

"And where are the parents of these amazing kids?"

James jumps to answer that, "Oh, they went on a-" but he's interrupted by the click of the door and they snap their hands in that direction to see who's there.

"Sorry! We're weak and we're here." Castle and Beckett say in unison as Castle closes the door behind them.

"Mommy! Daddy!" James and Hayley run to them, the boy jumping to his father's arms and the girl to her mother's.

"Hey babies!" Kate coos at her children. "I'm sorry Alexis, we just couldn't stay away much longer. But thanks for the date, it was-" She stops in her tracks when she sees the redheaded woman standing with Savannah in her arms and lifts her eyebrow.

"Meredith? What are you...doing here?" He asks when he notices his ex-wife in their living room.

"Oh my, it's been awhile, but you all look amazing! And Kate I have to say, Savannah is such a cutie! But oh, silly me, I've yet to tell why I'm in New York... Darling, can you hold your sister, please?" When Savannah is safely back in Alexis's arms, Meredith goes back to her huge bag and takes out some magazines. Bridal magazines. "I just came from Milan! I'm here to help my daughter plan her wedding, of course!" The grin on her face is too big for her own good.

The next thing on everyone else's mind is: Uh-oh!

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A/N: Hope you enjoyed this one. This week I got so many new and great prompts on tumblr and I'm just enjoying writing for them! Keep sending them here or my tumblr.

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