As for why it never appeared in the books, well, was there any real need? Unless DD was really out to scar Harry and a good potion of the younger HP readers for life by issuing a post-humus confession : "I had a hot summer fling with Grindelwald a hundred years ago!" If it really HAD appeared in the books, in any other manner than subtext, it would have been perceived as even more blatant tokenism.
Ok first
Ohmygod, I love the People picture!
But second, you're right, there isn't a need, although your proposal is quite funny. JK's more than entitled to make statements about this fabulous world she created in her head. I'm just an extremely hard evidence kind of person, so I guess my latest conclusion is that I'm tending to take her statements with a grain of salt? Or I'll just pretend she wrote more books, and more subtle clues dropped in.
JD
who can see an 8th book as Dumbledore's tell-all: My Hot Summer Fling
