"Okay," Jack grinned broadly at Donna.

"I dare you to not flirt with anyone for the whole time until your dare ends," Donna folded her arms smugly.

"I but..ah..bu- Donna!" Jack moaned.

Donna smiled.

"Aww, Donna your dare is so much cooler than that," the Doctor cried.

"Not to worry, Spaceman," Donna laughed. "Mr. Hotpants here hasn't given you your dare yet and I reckon it's going to be pretty good."

"Oh yeah," Jack leaned towards the Doctor. "But I don't want Miss Noble here to know what it is."

"Ooh!" the Doctor jumped up and down excitedly. "A secret dare!"

Jack whispered in his ear. The Doctor giggled.

"What's with the girly giggle Timeboy? Good dare?" Donna asked curiously.

The Doctor nodded, too excited for words.

"Ok, well, lets go see my Mum then."

Donna left the TARDIS and rang her doorbell. She frowned to herself and withdrew her keys from the pocket of her dress.

"Duh," she rammed the keys into the keyhole.

Jack laughed behind her, "Been away from home too long honey?

Donna blew a raspberry at him. She opened the door and walked inside.

"Who's that?" came the shrill voice of Sylvia Noble.

Donna sighed, "It's me Mum! Merry Christmas."

Sylvia and Wilfred came into the front hall. Donna gave her Grandfather a hug. Sylvia was glaring at the Captain.

"Hello," she said stiffly.

"Hello, I'm Captain Jack Harkness and who are-, Umm you must be Donna's mum."

Oops thought Jack. Hardly ten minutes in and I almost lost the dare already.

"Yes, I'm Sylvia Noble, Donna's mum," Sylvia nodded at Donna. "How do you know my daughter?"

"Mutual friend," Jack nodded towards the Doctor.

"I see."

They all got settled into the Noble household. The Doctor in the guest room, Jack on the sofa and Donna of course, in her room. Donna was getting changed when she realised she had left her Christmas presents for her family and her TARDIS key in the TARDIS. She walked out into the hall and to the guest bedroom. She knocked on the door. The Doctor opened it. He was wearing only his briefs, his shirt and his socks. Donna giggled.

She decided now was a good time to start her dare as any;
"Jingle bells, jingle bells,
jingle all the way,
Christmas in the Tardis,
what more can I say, HEY
Dashing through the Universe,
In a blue wooden box
Twirling through the stars,
Doctor's in his socks.
Companions by his side
As they hurl through Time and Space
Time Lord and his friends
Trying to get to the right place OH
Jingle bells ,Jingle bells
Jingle all the way
Christmas in the Tardis
What more can I say HEY
Jingle bells, Jingle bells,
Christmas really rocks
Oh what fun it is to ride
In that blue wooden box"

The Doctor laughed, "Did you make that up just then?"

Donna pretended to brush lint off her jeans (she'd changed out of the dress) "i have a talent."

"Mmm, sure."

Jack came up the stairs just then and hugged Donna from behind. She squealed loudly. Sylvia came rushing up the stairs to see what had happened.

Sylvia sighed, "Donna, Jack, not under my roof thanks."

Donna blushed.

Authors note: Thanks to everyone who reviewed. Also, if you can guess what Jack whispered to the Doctor I'll give you a virtual cupcake

Disclaimer: I don't own it *sigh*