A while ago I read a Twilight Sparkle and Spike fanfic that I can't seem to find anywhere, or remember the title of.
IIRC, it involved the two of them living forever, in a romantic relationship, but it might have been nsfw,,,
My main reason for wanting to reread it is my memory of it being well-written and pretty emotional-it ended with them on the small remains of the earth together in space.
Anyone who knows it, thank you in advance!!