A/N: So… this happened. It was my sister's idea. Not the "Everything's Fantastic" sister, the other sister. That's right, I got stuck with two of 'em.

Disclaimer: The twins are the only things I own. DONT TAKE THEM FROM ME. They're as much my babies as they are Tentoo and Rose's. And the song is by Jump5, not sure if originally but they did it so?

Rose braced herself for the bizarre when she entered the apartment to find her husband rolling on the floor laughing. "What's going on now?"

"They– they– Rose our children are brilliant!" the Doctor laughed.

Donna and Jack, their six-year-old twins, ran in from a side room. "Mummy!"

"Hey," Rose hugged her children. "What've you been getting up to then?"

"We were playing DoctorDonna!" Jack said.

"Oh," Rose said. "Neat!"

"That's not the best part," the Doctor said. "Go on then, ask 'em who's who!"

"Alright, who's who?" Rose asked.

"Well Donna wanted a turn as the Doctor," Jack said.

Rose started laughing too.

"I only just now figured this out!" the Doctor said. "I've been playing with them all day and I just figured this out!"

"I don't see what's so funny," Donna said. "We were taking turns. That's good, right?"

"That's brilliant, love, well done," Rose hugged her daughter again. She turned to the Doctor. "Wait, so who are you?"

"The TARDIS."

Rose's knees buckled under her laughter. "You're the– that's brilliant!"

"Thanks," Jack smiled smugly.

"Now you're here, you can be River," Donna said.

"Oh, we're playing that one, are we?" Rose looked to the Doctor to see his reaction. She expected him to be sad– River had died on their adventure. But he had a grin on his face. Why was that, she wondered? He did seem to know more about River than he told. Anyway, he seemed pleased with the casting.

"I'll get you a book," Donna said.

"Wasn't Melody playing with you?" Rose asked Jack.

"Yeah, but she was a bad River, so she's the vashta nerada instead," Jack explained. "She's hiding and we've gotta find her and save the Library."

"Oh, okay," Rose said.

"I gotta book!" Donna ran back in, handing her mother The Princess Bride.

"Brilliant," Rose said, taking it from her. "What do I need to do, then?"

"You walk in and be awesome and we'll just be confuzzled." Jack ordered, pointing to the door.

"Got it," Rose nodded, turning around and heading for the door.

"I told you Jack, 'confuzzled' is not a word," the Doctor chided.

"Shut up, TARDIS," Donna poked the Doctor with the sonic screwdriver.

"Oi!" The Doctor stood, looking down at the twins from his full six feet.

"Just take us to the Library, ya dumb box," Jack crossed his arms.

"How about I take you to a junkyard on Pluto instead?" he lifted Donna in his left arm and Jack in his right. They giggled as he spun around the living room, making vworp sound effects with his mouth. Eventually he fell over onto the couch with his children in his arms, laughing hysterically.

"We made it! The TARDIS didn't take us to a junkyard!" Donna leapt down triumphantly.

"Wow, Doctor, look at all these books!" Jack looked up in wonder at the imaginary bookshelves.

"I know, isn't it amazing!" Donna bounced up and down.

"But why is no one else here?" Jack asked.

"I dunno, maybe you scared them off," Donna suggested, pointing the sonic screwdriver at her brother and pressing a button. The screwdriver lit up blue and made a whirring noise.

"Oi! Don't sonic your brother!" The Doctor yelped.

Donna quickly released the button. "Sorry, Dad."

"'S okay, you didn't do any harm," the Doctor leaned back on the couch. There was an upside to playing the role of the TARDIS.

He watched the twins run about, skipping around shadows, for a few minutes before Rose came back in, book in hand.

"'S River!" Jack yelled.

Donna clapped her hand over his mouth. "Shh. We don't know her yet, remember?"

"Oops," Jack said.

"Hello Doctor," Rose said to Donna.

"No no no, she says 'Hello Sweetie'!" Donna corrected her mother.

"Hello Sweetie," Rose corrected herself.

"That's it. Now flip through the book," Donna instructed.

Rose did as she was told. She sat on her knees next to her twins, flipping through The Princess Bride. "Have we done the fire swamp yet?"

"Nope," Donna said.

Rose flipped through the pages. "What about the Dread Pirate Roberts?"

"Huh-uh," Donna shook her head.

"What about the sword fight?" Rose asked.

"Nope."

"How about–"

Rose was saved from coming up with another adventure by Melody, who ran in wearing a black scarf shouting "Rawr!"

"Mels, vashta nerada don't say 'rawr,' they say 'hey, who turned out the lights?'"

Melody grimaced. "That's not as fun."

She ran after them, and chased then around the couch twice before Rose let her catch her.

"Oh!" She groaned when Melody grabbed her sleeve. She fell over dramatically. "Go on without me, Doctor! Save the Library!"

"No, that's not how it happened!" Donna exclaimed.

"Time can be rewritten," Rose said.

"Stop it! That's not how it happened!" Donna yelled.

"Donna, you've got to have your own adventures too," the Doctor said, "you can't just relive ours."

Donna huffed. "Fine."

"I got the TARDIS!" Melody grabbed hold of the Doctor's leg.

"Oh no!" The Doctor cried. "You're on your own, now, Doctor!"

Donna stood up straight, brandishing the sonic screwdriver. "Come on, Donna, let's save the TARDIS!" She peeked around the couch, but her brother wasn't there. "Jack?"

"Donna Noble has left the library," came a voice from under the couch, "Donna Noble has been saved."

"Oh don't give me that," Donna bent down to look under the couch. "Get out here an help me save the day. I can't do it without you, Donna."

"Aw," Rose cooed.

"River, you're s'posed to be dead," Donna complained.

"Sorry," Rose closed her eyes.

"Ha ha, I've got you!" Melody grabbed Donna.

"No! You'll never take me alive!" Donna struggled against the older girl. "If I die then Donna and Jack will never be born!"

"Oh," Melody considered. "Well, actually, I'm a nice vashta nerada, and I just wanted a hug."

The Doctor and Rose laughed.

"Oh," Donna said. "Okay, I'll give you a hug." She hugged Melody back.

"Does this mean I'm not dead, then?" Rose asked, opening one eye.

"No, still dead," Jack said, crawling out from under the couch.

"Don't worry River, I'll save you," the Doctor stood up from the couch, walking over to where his wife lay on the floor. He lifted her in his arms and, spinning and going vworp vworp vworp, he sat back on the couch.

"Kiss her!" Melody cried.

"Ew, the TARDIS can't kiss River," Jack wrinkled his nose.

"But the Metacrisis Doctor can kiss Rose," the Doctor smirked, then kissed his wife.

"Okay okay, enough kissing," Melody said.

A/N: okay yes I'm mean like that. I hope you enjoyed some more fluff! Next chapter I get to requests. Review pls!

"One question, why did Jack tell them his dad was an alien?" — Ruth Joyce

I thought I would answer this here so that anyone else who was confused about it could hear my reasoning as well.

Throughout the previous chapters the Doctor and Rose have been telling the twins their stories as if they're fact (because they are). So the twins, of course, would think that it's just a fact, like Janie saying "my dad was a soldier" or Andy saying "my mum is a police officer." But it's Donna and Jack saying "oh yeah our dad is a Time Lord/Human Metacrisis." One of these three is not like the other, as they soon discover.

Yes, it is more likely that Rose and Tentoo would tell them to keep it quiet. But then, these are the children of "I'm a 903-year-old Time Lord of Gallifrey in the constellation of Kastorboros and I'm the man who's going to save the planet you got a problem with that son" and "lol psych Cassandra actually I'm the last human" so I doubt they would naturally grasp subtlety.

Does that answer your question?