Heheee... I chuckled at "it's bigger on the inside". :)

Not that it will be useful, but here is my post in which I first squeed all over this plot bunny! I'm still bizarrely attached to the idea of them *actually* being her parents, but I must admit that your way fits much more nicely into canon! And frankly I never thought anyone would touch this with a ten-foot pole so you're all good in my book, fic format be damned. ;)

As long as you write it, I WILL READ IT. :D