Jack was watching his younger self and his mother with a fond sort of smile. His mother looked exactly as he remembered her, right to every detail. The sound of her voice was like music to his ears, and he felt as though if he let himself, he could get lost in it.

But he couldn't get lost. The Doctor spoke and it took a moment for Jack to realise the words, but as soon as he did he turned his head sharply, looked at him, shocked.

For a moment, he was utterly speechless.

Just a moment though.

"Don't you dare bring her into that."

He looked again back to his mother, more sadly this time. "She wouldn't even recognise me."