"Erin," Hayley called skipping down the hallway towards her sister's room looking around for the white door with the carvings on it. Hayley's father had taught her some Gallifreyan, and she could read her and her sisters names, as well as a few short sentences.

She came to the door and knocked three times, and then stood outside and waited. And waited. And waited. And then waited some more, until she could sense that her parents were getting impatient, so she knocked again, and called "Erin, we're going to Uncle Jack's come on! You know how impatient dad is."

But there was no answer.

So Hayley took a breath and hoped that her sister wouldn't totally kill her, and entered the room. And she was shocked by what she saw.

Erin was sitting on her bed, right in the middle with the TV blaring on full volume but she wasn't watching it. She was sitting on her bed, looking down at a book that Erin hadn't seen before. And there was something else Hayley hadn't seen before. Erin was crying. She was turning through the pages of the scrapbook, with pictures of her and melody in and she was sobbing. She hardly noticed Hayley enter the room, before she stepped over to the bed, and hesitantly asked "Erin?"

And Erin looked up at her baby sister, with her darker blue eyes as opposed to Erin's lighter ones, and her darker blonde hair, that only came down to her shoulders instead of Erin's platinum locks that fell to her waist and she looked at her facial expression, which looked concerned. So Erin quickly wiped her eyes, and looked up at her and quickly sniffed and smiled.

"Hey there buttercup," she said, trying not to let her voice sound shaky

"Hey," Hayley said quietly "You gonna tell me why you're so sad?"

"Sad? What I'm not, I'm not sad… thee are tears of joy at how excited I am about the trip to Riccina next month" She said, with a teary smile

"No you're not," Hayley said with a slight laugh "Is it about Melody? Did you two have a fight?"

Erin shook her head, and sniffed again "No we, we didn't fight it's just… were both getting older so quickly and soon enough, I'll regenerate and I might be a totally different age to her and we won't be friends anymore. And even if we are, one day I'll lose her.

Hayley looked sympathetically at her sister, and sat down on the bed beside her. "Erin, we're time lords. One day we're going to lose everyone. Melody and Bradley and Amy and Rory and everyone else, and then one day we'll lose mum and dad too. But do you know what?" she asked, turning her sisters face to look her in the eye.

"What?" Erin asked, quietly

"We will always have each other. Okay?"

Erin smiled, and hugged her sister tightly, stroking her hair gently.

"You're so grown up, you know that?"

"Yeah, it kinda comes with the territory" Hayley chuckled hugging back tighter.

And they sat like that for a little while, and didn't notice The Doctor and Rose come up to the door and throw it open giggling about goodness knows what

"Come on girls, Jack's waiting" The Doctor called, but Erin and Hayley ignored him, still locked in embrace.

"Rose they're hugging, what does that mean?" The Doctor asked, turning to Rose who was beaming

"It means their bonding as sisters, wow how cute is that." Rose said, wafting her eyes.

The Doctor just rolled his eyes, "Women, I'll never understand you. I'll be in the console room" he said, backing out and hurrying off.

Rose just smiled up at her girls, who she was very proud of and felt that warmth inside her that only came with intense emotion. She coughed slightly and Erin and Hayley looked up, and released each other. Erin sniffed and wiped her eyes, and Hayley bounded off the bed walking off towards her mother. "Are we at uncle Jack's yet?" she asked Rose, who looked slightly confused at the sudden change of emotion.

"Erm... yeah I think so, go and ask dad he's in the console room"

"You're so bloody impatient," Erin scoffed, looking in the mirror and putting more mascara on.

"Whatever princess" Hayley said walking out.

Rose rolled her eyes, giving up on the moment and walked out after her, not noticing the smile Erin had on her face as she looked into the mirror, and smiled at a picture on her dresser of her, age four holding her newborn sister, beaming up at the camera.

She was going to be okay. She had her sister.