Confessions of a Liberal Puritan

Aww, you've actually made me feel better about Donna - thank you!

And I am sure she found this immensely reassuring:

“It’s nothing to worry about,” said Tara, “We’ve seen this before –
Well, maybe not this exactly, but nearly!
Your aura’s so dazzling, I should have guessed when you came in the door,
but I guess I wasn’t seeing you clearly.”

“You’re not human,” added Anya, “or you weren’t to start.
You’ve joined this existence as a gift.
That’s why your memories don’t match, and you’re growing a spare heart,
All symptoms of a recent reality shift.

Hee, hee - well summarised.

And now I can imagine Donna striding off to Torchwood and causing absolute chaos, secure in the knowledge that she's a two hearted extra terrestrial with a Mission.

Excellent.